gen

package
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 Go to latest Published: May 16, 2022 License: Apache-2.0 Imports: 31 Imported by: 0

Documentation

Overview

Package gen is the interface for generating loaded schemas into a Go package.

Index

Constants

This section is empty.

Variables

View Source 
var (
	// FeaturePrivacy provides a feature-flag for the privacy extension for ent.
	FeaturePrivacy = Feature{
		Name:        "privacy",
		Stage:       Alpha,
		Default:     false,
		Description: "Privacy provides a privacy layer for ent through the schema configuration",
		// contains filtered or unexported fields
	}

	// FeatureEntQL provides a feature-flag for the entql extension for ent.
	FeatureEntQL = Feature{
		Name:        "entql",
		Stage:       Experimental,
		Default:     false,
		Description: "EntQL provides a generic filtering capability at runtime",
		// contains filtered or unexported fields
	}

	// FeatureSnapshot stores a snapshot of ent/schema and auto-solve merge-conflict (issue #852).
	FeatureSnapshot = Feature{
		Name:        "schema/snapshot",
		Stage:       Experimental,
		Default:     false,
		Description: "Schema snapshot stores a snapshot of ent/schema and auto-solve merge-conflict (issue #852)",
		GraphTemplates: []GraphTemplate{
			{
				Name:   "internal/schema",
				Format: "internal/schema.go",
			},
		},
		// contains filtered or unexported fields
	}

	// FeatureSchemaConfig allows users to pass init time alternate schema names
	// for each ent model. This is useful if your SQL tables are spread out against
	// multiple databases.
	FeatureSchemaConfig = Feature{
		Name:        "sql/schemaconfig",
		Stage:       Experimental,
		Default:     false,
		Description: "Allows alternate schema names for each ent model. Useful if SQL tables are spread out against multiple databases",
		GraphTemplates: []GraphTemplate{
			{
				Name:   "dialect/sql/internal/schemaconfig",
				Format: "internal/schemaconfig.go",
			},
		},
		// contains filtered or unexported fields
	}

	// FeatureLock provides a feature-flag for sql locking extension for ent.
	FeatureLock = Feature{
		Name:        "sql/lock",
		Stage:       Experimental,
		Default:     false,
		Description: "Allows users to use row-level locking in SQL using the 'FOR {UPDATE|SHARE}' clauses",
	}

	// FeatureModifier provides a feature-flag for adding query modifiers.
	FeatureModifier = Feature{
		Name:        "sql/modifier",
		Stage:       Experimental,
		Default:     false,
		Description: "Allows users to attach custom modifiers to queries",
	}

	// FeatureUpsert provides a feature-flag for adding upsert (ON CONFLICT) capabilities to create builders.
	FeatureUpsert = Feature{
		Name:        "sql/upsert",
		Stage:       Experimental,
		Default:     false,
		Description: "Allows users to configure the `ON CONFLICT`/`ON DUPLICATE KEY` clause for `INSERT` statements",
	}

	FeatureVersionedMigration = Feature{
		Name:        "sql/versioned-migration",
		Stage:       Experimental,
		Default:     false,
		Description: "Allows users to work with versioned migrations / migration files",
	}

	// AllFeatures holds a list of all feature-flags.
	AllFeatures = []Feature{
		FeaturePrivacy,
		FeatureEntQL,
		FeatureSnapshot,
		FeatureSchemaConfig,
		FeatureLock,
		FeatureModifier,
		FeatureUpsert,
		FeatureVersionedMigration,
	}
)
View Source 
var (
	// Templates holds the template information for a file that the graph is generating.
	Templates = []TypeTemplate{
		{
			Name:   "create",
			Format: pkgf("%s_create.go"),
			ExtendPatterns: []string{
				"dialect/*/create/fields/additional/*",
				"dialect/*/create_bulk/fields/additional/*",
			},
		},
		{
			Name:   "update",
			Format: pkgf("%s_update.go"),
		},
		{
			Name:   "delete",
			Format: pkgf("%s_delete.go"),
		},
		{
			Name:   "query",
			Format: pkgf("%s_query.go"),
			ExtendPatterns: []string{
				"dialect/*/query/fields/additional/*",
			},
		},
		{
			Name:   "model",
			Format: pkgf("%s.go"),
		},
		{
			Name:   "where",
			Format: pkgf("%s/where.go"),
			ExtendPatterns: []string{
				"where/additional/*",
			},
		},
		{
			Name: "meta",
			Format: func(t *Type) string {
				return fmt.Sprintf("%[1]s/%[1]s.go", t.PackageDir())
			},
			ExtendPatterns: []string{
				"meta/additional/*",
			},
		},
	}
	// GraphTemplates holds the templates applied on the graph.
	GraphTemplates = []GraphTemplate{
		{
			Name:   "base",
			Format: "ent.go",
		},
		{
			Name:   "client",
			Format: "client.go",
			ExtendPatterns: []string{
				"client/fields/additional/*",
				"dialect/*/query/fields/init/*",
			},
		},
		{
			Name:   "context",
			Format: "context.go",
		},
		{
			Name:   "tx",
			Format: "tx.go",
		},
		{
			Name:   "config",
			Format: "config.go",
			ExtendPatterns: []string{
				"dialect/*/config/*/*",
			},
		},
		{
			Name:   "mutation",
			Format: "mutation.go",
		},
		{
			Name:   "migrate",
			Format: "migrate/migrate.go",
			Skip:   func(g *Graph) bool { return !g.SupportMigrate() },
		},
		{
			Name:   "schema",
			Format: "migrate/schema.go",
			Skip:   func(g *Graph) bool { return !g.SupportMigrate() },
		},
		{
			Name:   "predicate",
			Format: "predicate/predicate.go",
		},
		{
			Name:   "hook",
			Format: "hook/hook.go",
		},
		{
			Name:   "privacy",
			Format: "privacy/privacy.go",
			Skip: func(g *Graph) bool {
				return !g.featureEnabled(FeaturePrivacy)
			},
		},
		{
			Name:   "entql",
			Format: "entql.go",
			Skip: func(g *Graph) bool {
				return !g.featureEnabled(FeatureEntQL)
			},
		},
		{
			Name:   "runtime/ent",
			Format: "runtime.go",
		},
		{
			Name:   "enttest",
			Format: "enttest/enttest.go",
		},
		{
			Name:   "runtime/pkg",
			Format: "runtime/runtime.go",
		},
	}
)
View Source 
var (
	// Funcs are the predefined template
	// functions used by the codegen.
	Funcs = template.FuncMap{
		"ops":           fieldOps,
		"add":           add,
		"append":        reflect.Append,
		"appends":       reflect.AppendSlice,
		"order":         order,
		"camel":         camel,
		"snake":         snake,
		"pascal":        pascal,
		"extend":        extend,
		"xrange":        xrange,
		"receiver":      receiver,
		"plural":        plural,
		"aggregate":     aggregate,
		"primitives":    primitives,
		"singular":      rules.Singularize,
		"quote":         strconv.Quote,
		"base":          filepath.Base,
		"keys":          keys,
		"join":          join,
		"isNil":         isNil,
		"lower":         strings.ToLower,
		"upper":         strings.ToUpper,
		"hasField":      hasField,
		"hasImport":     hasImport,
		"indirect":      indirect,
		"hasPrefix":     strings.HasPrefix,
		"hasSuffix":     strings.HasSuffix,
		"trimPackage":   trimPackage,
		"xtemplate":     xtemplate,
		"hasTemplate":   hasTemplate,
		"matchTemplate": matchTemplate,
		"split":         strings.Split,
		"tagLookup":     tagLookup,
		"toString":      toString,
		"dict":          dict,
		"get":           get,
		"set":           set,
		"unset":         unset,
		"hasKey":        hasKey,
		"list":          list,
		"fail":          fail,
		"replace":       strings.ReplaceAll,
	}
)

Functions

func PrepareEnv 

func PrepareEnv(c *Config) (undo func() error, err error)

PrepareEnv makes sure the generated directory (environment) is suitable for loading the `ent` package (avoid cyclic imports).

func ValidSchemaName 

func ValidSchemaName(name string) error

ValidSchemaName will determine if a name is going to conflict with any pre-defined names

Types

type Annotations 

type Annotations map[string]interface{}

Annotations defines code generation annotations to be passed to the templates. It can be defined on most elements in the schema (node, field, edge), or globally on the Config object. The mapping is from the annotation name (e.g. "EntGQL") to the annotation itself. Note that, annotations that are defined in the schema must be JSON encoded/decoded.

type Config 

type Config struct {
	// Schema holds the Go package path for the user ent/schema.
	// For example, "<project>/ent/schema".
	Schema string

	// Target defines the filepath for the target directory that
	// holds the generated code. For example, "./project/ent".
	//
	// By default, 'ent generate ./ent/schema' uses './ent' as a
	// target directory.
	Target string

	// Package defines the Go package path of the target directory
	// mentioned above. For example, "github.com/org/project/ent".
	//
	// By default, for schema package named "<project>/ent/schema",
	// 'ent generate' uses "<project>/ent" as a default package.
	Package string

	// Header allows users to provides an optional header signature for
	// the generated files. It defaults to the standard 'go generate'
	// format: '// Code generated by entc, DO NOT EDIT.'.
	Header string

	// Storage configuration for the codegen. Defaults to sql.
	Storage *Storage

	// IDType specifies the type of the id field in the codegen.
	// The supported types are string and int, which also the default.
	IDType *field.TypeInfo

	// Templates specifies a list of alternative templates to execute or
	// to override the default. If nil, the default template is used.
	//
	// Note that, additional templates are executed on the Graph object and
	// the execution output is stored in a file derived by the template name.
	Templates []*Template

	// Features defines a list of additional features to add to the codegen phase.
	// For example, the PrivacyFeature.
	Features []Feature

	// Hooks holds an optional list of Hooks to apply on the graph before/after the code-generation.
	Hooks []Hook

	// Annotations that are injected to the Config object can be accessed
	// globally in all templates. In order to access an annotation from a
	// graph template, do the following:
	//
	//	{{- with $.Annotations.GQL }}
	//		{{/* Annotation usage goes here. */}}
	//	{{- end }}
	//
	// For type templates, we access the Config field to access the global
	// annotations, and not the type-specific annotation.
	//
	//	{{- with $.Config.Annotations.GQL }}
	//		{{/* Annotation usage goes here. */}}
	//	{{- end }}
	//
	// Note that the mapping is from the annotation-name (e.g. "GQL") to a JSON decoded object.
	Annotations Annotations
}

The Config holds the global codegen configuration to be shared between all generated nodes.

func (Config) FeatureEnabled 

func (c Config) FeatureEnabled(name string) (bool, error)

FeatureEnabled reports if the given feature name is enabled. It's exported to be used by the template engine as follows: 

{{ with $.FeatureEnabled "privacy" }}
	...
{{ end }}

func (Config) ModuleInfo 

func (Config) ModuleInfo() (m debug.Module)

ModuleInfo returns the github.com/qkbyte/ent version.

type Dependencies 

type Dependencies []*Dependency

Dependencies wraps a list of dependencies as codegen annotation.

func (Dependencies) Merge 

func (d Dependencies) Merge(other schema.Annotation) schema.Annotation

Merge implements the schema.Merger interface.

func (Dependencies) Name 

func (Dependencies) Name() string

Name describes the annotation name.

type Dependency 

type Dependency struct {
	// Field defines the struct field name on the builders.
	// It defaults to the full type name. For example:
	//
	//	http.Client	=> HTTPClient
	//	net.Conn	=> NetConn
	//	url.URL		=> URL
	//
	Field string
	// Type defines the type identifier. For example, `*http.Client`.
	Type *field.TypeInfo
	// Option defines the name of the config option.
	// It defaults to the field name.
	Option string
}

Dependency allows configuring optional dependencies as struct fields on the generated builders. For example: 

DependencyAnnotation{
	Field:	"HTTPClient",
	Type:	"*http.Client",
	Option:	"WithClient",
}

Although the Dependency and the DependencyAnnotation are exported, used should use the entc.Dependency option in order to build this annotation.

func (*Dependency) Build 

func (d *Dependency) Build() error

Build builds the annotation and fails if it is invalid.

type Edge 

type Edge struct {

	// Name holds the name of the edge.
	Name string
	// Type holds a reference to the type this edge is directed to.
	Type *Type
	// Optional indicates is this edge is optional on create.
	Optional bool
	// Unique indicates if this edge is a unique edge.
	Unique bool
	// Inverse holds the name of the reference edge declared in the schema.
	Inverse string
	// Ref points to the reference edge. For Inverse edges (edge.From),
	// its points to the Assoc (edge.To). For Assoc edges, it points to
	// the inverse edge if it exists.
	Ref *Edge
	// Owner holds the type of the edge-owner. For assoc-edges it's the
	// type that holds the edge, for inverse-edges, it's the assoc type.
	Owner *Type
	// StructTag of the edge-field in the struct. default to "json".
	StructTag string
	// Relation holds the relation info of an edge.
	Rel Relation
	// Bidi indicates if this edge is a bidirectional edge. A self-reference
	// to the same type with the same name (symmetric relation). For example,
	// a User type have one of following edges:
	//
	//	edge.To("friends", User.Type)           // many 2 many.
	//	edge.To("spouse", User.Type).Unique()   // one 2 one.
	//
	Bidi bool
	// Annotations that were defined for the edge in the schema.
	// The mapping is from the Annotation.Name() to a JSON decoded object.
	Annotations Annotations
	// contains filtered or unexported fields
}

Edge of a graph between two types.

func (Edge) BuilderField 

func (e Edge) BuilderField() string

BuilderField returns the struct member of the edge in the builder.

func (Edge) ColumnConstant 

func (e Edge) ColumnConstant() string

ColumnConstant returns the constant name of the relation column.

func (Edge) Constant 

func (e Edge) Constant() string

Constant returns the constant name of the edge.

func (Edge) EagerLoadField 

func (e Edge) EagerLoadField() string

EagerLoadField returns the struct field (of query builder) for storing the eager-loading info.

func (Edge) EntSQL 

func (e Edge) EntSQL() *entsql.Annotation

EntSQL returns the EntSQL annotation if exists.

func (Edge) Field 

func (e Edge) Field() *Field

Field returns the field that was referenced in the schema. For example: 

edge.From("owner", User.Type).
	Ref("pets").
	Field("owner_id")

Note that the zero value is returned if no field was defined in the schema.

func (*Edge) ForeignKey 

func (e *Edge) ForeignKey() (*ForeignKey, error)

ForeignKey returns the foreign-key of the inverse-field.

func (Edge) HasConstraint 

func (e Edge) HasConstraint() bool

HasConstraint indicates if this edge has a unique constraint check. We check uniqueness when both-directions are unique or one of them. Used by the Gremlin storage-layer.

func (Edge) HasFieldSetter 

func (e Edge) HasFieldSetter() bool

HasFieldSetter reports if this edge already has a field-edge setters for its mutation API. It's used by the codegen templates to avoid generating duplicate setters for id APIs (e.g. SetOwnerID).

func (Edge) InverseLabelConstant 

func (e Edge) InverseLabelConstant() string

InverseLabelConstant returns the inverse constant name of the edge.

func (Edge) InverseTableConstant 

func (e Edge) InverseTableConstant() string

InverseTableConstant returns the constant name of the other/inverse type of the relation.

func (Edge) IsInverse 

func (e Edge) IsInverse() bool

IsInverse returns if this edge is an inverse edge.

func (Edge) Label 

func (e Edge) Label() string

Label returns the Gremlin label name of the edge. If the edge is inverse

func (Edge) LabelConstant 

func (e Edge) LabelConstant() string

LabelConstant returns the constant name of the edge for the gremlin dialect. If the edge is inverse, it returns the constant name of the owner-edge (assoc-edge).

func (Edge) M2M 

func (e Edge) M2M() bool

M2M indicates if this edge is M2M edge.

func (Edge) M2O 

func (e Edge) M2O() bool

M2O indicates if this edge is M2O edge.

func (Edge) MutationAdd 

func (e Edge) MutationAdd() string

MutationAdd returns the method name for adding edge ids.

func (Edge) MutationClear 

func (e Edge) MutationClear() string

MutationClear returns the method name for clearing the edge value. The default name is "Clear<EdgeName>". If the method conflicts with the mutation methods, suffix the method with "Edge".

func (Edge) MutationCleared 

func (e Edge) MutationCleared() string

MutationCleared returns the method name for indicating if the edge was cleared in the mutation. The default name is "<EdgeName>Cleared". If the method conflicts with the mutation methods, add "Edge" the after the edge name.

func (Edge) MutationRemove 

func (e Edge) MutationRemove() string

MutationRemove returns the method name for removing edge ids.

func (Edge) MutationReset 

func (e Edge) MutationReset() string

MutationReset returns the method name for resetting the edge value. The default name is "Reset<EdgeName>". If the method conflicts with the mutation methods, suffix the method with "Edge".

func (Edge) MutationSet 

func (e Edge) MutationSet() string

MutationSet returns the method name for setting the edge id.

func (Edge) O2M 

func (e Edge) O2M() bool

O2M indicates if this edge is O2M edge.

func (Edge) O2O 

func (e Edge) O2O() bool

O2O indicates if this edge is O2O edge.

func (Edge) OwnFK 

func (e Edge) OwnFK() bool

OwnFK indicates if the foreign-key of this edge is owned by the edge column (reside in the type's table). Used by the SQL storage-driver.

func (Edge) PKConstant 

func (e Edge) PKConstant() string

PKConstant returns the constant name of the primary key. Used for M2M edges.

func (Edge) StorageKey 

func (e Edge) StorageKey() (*edge.StorageKey, error)

StorageKey returns the storage-key defined on the schema if exists.

func (Edge) StructField 

func (e Edge) StructField() string

StructField returns the struct member of the edge in the model.

func (Edge) TableConstant 

func (e Edge) TableConstant() string

TableConstant returns the constant name of the relation table.

type Enum 

type Enum struct {
	// Name is the Go name of the enum.
	Name string
	// Value in the schema.
	Value string
}

Enum holds the enum information for schema enums in codegen.

type Feature 

type Feature struct {
	// Name of the feature.
	Name string

	// Stage of the feature.
	Stage FeatureStage

	// Default values indicates if this feature is enabled by default.
	Default bool

	// A Description of this feature.
	Description string

	// Templates defines list of templates for extending or overriding the default
	// templates. In order to write the template output to a standalone file, use
	// the GraphTemplates below.
	Templates []*Template

	// GraphTemplates defines optional templates to be executed on the graph
	// and will their output will be written to the configured destination.
	GraphTemplates []GraphTemplate
	// contains filtered or unexported fields
}

A Feature of the ent codegen.

type FeatureStage 

type FeatureStage int

FeatureStage describes the stage of the codegen feature. 

const (

	// Experimental features are in development, and actively being tested in the
	// integration environment.
	Experimental FeatureStage

	// Alpha features are features whose initial development was finished, tested
	// on the infra of the ent team, but we expect breaking-changes to their APIs.
	Alpha

	// Beta features are Alpha features that were added to the entgo.io
	// documentation, and no breaking-changes are expected for them.
	Beta

	// Stable features are Beta features that were running for a while on ent
	// infra.
	Stable
)

type Field 

type Field struct {

	// Name is the name of this field in the database schema.
	Name string
	// Type holds the type information of the field.
	Type *field.TypeInfo
	// Unique indicate if this field is a unique field.
	Unique bool
	// Optional indicates is this field is optional on create.
	Optional bool
	// Nillable indicates that this field can be null in the
	// database and pointer in the generated entities.
	Nillable bool
	// Default indicates if this field has a default value for creation.
	Default bool
	// Enums information for enum fields.
	Enums []Enum
	// UpdateDefault indicates if this field has a default value for update.
	UpdateDefault bool
	// Immutable indicates is this field cannot be updated.
	Immutable bool
	// StructTag of the field. default to "json".
	StructTag string
	// Validators holds the number of validators this field have.
	Validators int
	// Position info of the field.
	Position *load.Position
	// UserDefined indicates that this field was defined explicitly by the user in
	// the schema. Unlike the default id field, which is defined by the generator.
	UserDefined bool
	// Annotations that were defined for the field in the schema.
	// The mapping is from the Annotation.Name() to a JSON decoded object.
	Annotations Annotations
	// contains filtered or unexported fields
}

Field holds the information of a type field used for the templates.

func (Field) BasicType 

func (f Field) BasicType(ident string) (expr string)

BasicType returns a Go expression for the given identifier to convert it to a basic type. For example: 

v (http.Dir)		=> string(v)
v (fmt.Stringer)	=> v.String()
v (sql.NullString)	=> v.String

func (Field) BuilderField 

func (f Field) BuilderField() string

BuilderField returns the struct member of the field in the builder.

func (Field) Column 

func (f Field) Column() *schema.Column

Column returns the table column. It sets it as a primary key (auto_increment) in case of ID field, unless stated otherwise.

func (Field) Comment 

func (f Field) Comment() string

Comment returns the comment of the field,

func (Field) Constant 

func (f Field) Constant() string

Constant returns the constant name of the field.

func (Field) ConvertedToBasic 

func (f Field) ConvertedToBasic() bool

ConvertedToBasic indicates if the Go type of the field can be converted to basic type (string, int, etc.).

func (Field) DefaultFunc 

func (f Field) DefaultFunc() bool

DefaultFunc returns a bool stating if the default value is a func. Invoked by the template.

func (Field) DefaultName 

func (f Field) DefaultName() string

DefaultName returns the variable name of the default value of this field.

func (Field) DefaultValue 

func (f Field) DefaultValue() interface{}

DefaultValue returns the default value of the field. Invoked by the template.

func (Field) Edge 

func (f Field) Edge() (*Edge, error)

Edge returns the edge this field is point to.

func (Field) EntSQL 

func (f Field) EntSQL() *entsql.Annotation

EntSQL returns the EntSQL annotation if exists.

func (Field) EnumName 

func (f Field) EnumName(enum string) string

EnumName returns the constant name for the enum.

func (Field) EnumNames 

func (f Field) EnumNames() []string

EnumNames returns the enum values of a field.

func (Field) EnumValues 

func (f Field) EnumValues() []string

EnumValues returns the values of the enum field.

func (Field) HasGoType 

func (f Field) HasGoType() bool

HasGoType indicate if a basic field (like string or bool) has a custom GoType.

func (Field) IsBool 

func (f Field) IsBool() bool

IsBool returns true if the field is a bool field.

func (Field) IsBytes 

func (f Field) IsBytes() bool

IsBytes returns true if the field is a bytes field.

func (Field) IsEdgeField 

func (f Field) IsEdgeField() bool

IsEdgeField reports if the given field is an edge-field (i.e. a foreign-key) that was referenced by one of the edges.

func (Field) IsEnum 

func (f Field) IsEnum() bool

IsEnum returns true if the field is an enum field.

func (Field) IsInt 

func (f Field) IsInt() bool

IsInt returns true if the field is an int field.

func (Field) IsInt64 

func (f Field) IsInt64() bool

IsInt64 returns true if the field is an int64 field.

func (Field) IsJSON 

func (f Field) IsJSON() bool

IsJSON returns true if the field is a JSON field.

func (Field) IsOther 

func (f Field) IsOther() bool

IsOther returns true if the field is an Other field.

func (Field) IsString 

func (f Field) IsString() bool

IsString returns true if the field is a string field.

func (Field) IsTime 

func (f Field) IsTime() bool

IsTime returns true if the field is a timestamp field.

func (Field) IsUUID 

func (f Field) IsUUID() bool

IsUUID returns true if the field is a UUID field.

func (Field) MutationAddAssignExpr 

func (f Field) MutationAddAssignExpr(ident1, ident2 string) (string, error)

MutationAddAssignExpr returns the expression for summing to identifiers and assigning to the mutation field. 

MutationAddAssignExpr(a, b) => *m.a += b		// Basic Go type.
MutationAddAssignExpr(a, b) => *m.a = m.Add(b)	// Custom Go types that implement the (Add(T) T) interface.

func (Field) MutationClear 

func (f Field) MutationClear() string

MutationClear returns the method name for clearing the field value.

func (Field) MutationCleared 

func (f Field) MutationCleared() string

MutationCleared returns the method name for indicating if the field was cleared in the mutation.

func (Field) MutationGet 

func (f Field) MutationGet() string

MutationGet returns the method name for getting the field value. The default name is just a pascal format. If the method conflicts with the mutation methods, prefix the method with "Get".

func (Field) MutationGetOld 

func (f Field) MutationGetOld() string

MutationGetOld returns the method name for getting the old value of a field.

func (Field) MutationReset 

func (f Field) MutationReset() string

MutationReset returns the method name for resetting the field value. The default name is "Reset<FieldName>". If the method conflicts with the mutation methods, suffix the method with "Field".

func (Field) MutationSet 

func (f Field) MutationSet() string

MutationSet returns the method name for setting the field value. The default name is "Set<FieldName>". If the method conflicts with the mutation methods, suffix the method with "Field".

func (Field) NewScanType 

func (f Field) NewScanType() string

NewScanType returns an expression for creating an new object to be used by the `rows.Scan` method. An sql.Scanner or a nillable-type supported by the SQL driver (e.g. []byte).

func (Field) NillableValue 

func (f Field) NillableValue() bool

NillableValue reports if the field holds a Go value (not a pointer), but the field is nillable. It's used by the templates to prefix values with pointer operators (e.g. &intValue or *intValue).

func (*Field) Ops 

func (f *Field) Ops() []Op

Ops returns all predicate operations of the field.

func (Field) PK 

func (f Field) PK() *schema.Column

PK is like Column, but for table primary key.

func (Field) ScanType 

func (f Field) ScanType() string

ScanType returns the Go type that is used for `rows.Scan`.

func (Field) ScanTypeField 

func (f Field) ScanTypeField(rec string) string

ScanTypeField extracts the nullable type field (if exists) from the given receiver. It also does the type conversion if needed.

func (Field) Sensitive 

func (f Field) Sensitive() bool

Sensitive returns true if the field is a sensitive field.

func (Field) SignedType 

func (f Field) SignedType() (*field.TypeInfo, error)

SignedType returns the "signed type version" of the field type. This behavior is required for supporting addition/subtraction in mutations for unsigned types.

func (Field) StorageKey 

func (f Field) StorageKey() string

StorageKey returns the storage name of the field. SQL column or Gremlin property.

func (Field) StructField 

func (f Field) StructField() string

StructField returns the struct member of the field in the model.

func (Field) SupportsMutationAdd 

func (f Field) SupportsMutationAdd() bool

SupportsMutationAdd reports if the field supports the mutation "Add(T) T" interface.

func (Field) UpdateDefaultName 

func (f Field) UpdateDefaultName() string

UpdateDefaultName returns the variable name of the update default value of this field.

func (Field) Validator 

func (f Field) Validator() string

Validator returns the validator name.

type ForeignKey 

type ForeignKey struct {
	// Field information for the foreign-key column.
	Field *Field
	// Edge that is associated with this foreign-key.
	Edge *Edge
	// UserDefined indicates that this foreign-key was defined explicitly as a field in the schema,
	// and was referenced by an edge. For example:
	//
	//	field.Int("owner_id").
	//		Optional()
	//
	//	edge.From("owner", User.Type).
	//		Ref("pets").
	//		Field("owner_id")
	//
	UserDefined bool
}

ForeignKey holds the information for foreign-key columns of types. It's exported only because it's used by the codegen templates and should not be used beside that.

func (ForeignKey) StructField 

func (f ForeignKey) StructField() string

StructField returns the struct member of the foreign-key in the generated model.

type GenerateFunc 

type GenerateFunc func(*Graph) error

The GenerateFunc type is an adapter to allow the use of ordinary function as Generator. If f is a function with the appropriate signature, GenerateFunc(f) is a Generator that calls f.

func (GenerateFunc) Generate 

func (f GenerateFunc) Generate(g *Graph) error

Generate calls f(g).

type Generator 

type Generator interface {
	// Generate generates the ent artifacts for the given graph.
	Generate(*Graph) error
}

Generator is the interface that wraps the Generate method.

type Graph 

type Graph struct {
	*Config
	// Nodes are list of Go types that mapped to the types in the loaded schema.
	Nodes []*Type
	// Schemas holds the raw interfaces for the loaded schemas.
	Schemas []*load.Schema
}

Graph holds the nodes/entities of the loaded graph schema. Note that, it doesn't hold the edges of the graph. Instead, each Type holds the edges for other Types.

func NewGraph 

func NewGraph(c *Config, schemas ...*load.Schema) (g *Graph, err error)

NewGraph creates a new Graph for the code generation from the given schema definitions. It fails if one of the schemas is invalid.

func (*Graph) Gen 

func (g *Graph) Gen() error

Gen generates the artifacts for the graph.

func (*Graph) SchemaSnapshot 

func (g *Graph) SchemaSnapshot() (string, error)

SchemaSnapshot returns a JSON string represents the graph schema in loadable format.

func (*Graph) SupportMigrate 

func (g *Graph) SupportMigrate() bool

SupportMigrate reports if the codegen supports schema migration.

func (*Graph) Tables 

func (g *Graph) Tables() (all []*schema.Table, err error)

Tables returns the schema definitions of SQL tables for the graph.

type GraphTemplate 

type GraphTemplate struct {
	Name           string            // template name.
	Skip           func(*Graph) bool // skip condition (storage constraints or gated by a feature-flag).
	Format         string            // file name format.
	ExtendPatterns []string          // extend patterns.
}

GraphTemplate specifies a template that is executed with the Graph object.

type Hook 

type Hook func(Generator) Generator

Hook defines the "generate middleware". A function that gets a Generator and returns a Generator. For example: 

hook := func(next gen.Generator) gen.Generator {
	return gen.GenerateFunc(func(g *Graph) error {
		fmt.Println("Graph:", g)
		return next.Generate(g)
	})
}

type Index 

type Index struct {
	// Name of the index. One column index is simply the column name.
	Name string
	// Unique index or not.
	Unique bool
	// Columns are the table columns.
	Columns []string
	// Annotations that were defined for the index in the schema.
	// The mapping is from the Annotation.Name() to a JSON decoded object.
	Annotations Annotations
}

Index represents a database index used for either increasing speed on database operations or defining constraints such as "UNIQUE INDEX". Note that some indexes are created implicitly like table foreign keys.

type Op 

type Op int

Op represents a predicate operation for schema fields. 

const (
	EQ           Op = iota // =
	NEQ                    // <>
	GT                     // >
	GTE                    // >=
	LT                     // <
	LTE                    // <=
	IsNil                  // IS NULL / has
	NotNil                 // IS NOT NULL / hasNot
	In                     // within
	NotIn                  // without
	EqualFold              // equals case-insensitive
	Contains               // containing
	ContainsFold           // containing case-insensitive
	HasPrefix              // startingWith
	HasSuffix              // endingWith
)

List of all builtin predicates.

func (Op) Name 

func (o Op) Name() string

Name returns the string representation of an operator.

func (Op) Niladic 

func (o Op) Niladic() bool

Niladic reports if the operator is niladic (takes no arguments).

func (Op) Variadic 

func (o Op) Variadic() bool

Variadic reports if the operator is a variadic function (takes a varying number of arguments).

type Rel 

type Rel int

Rel is a relation type of an edge. 

const (
	Unk Rel = iota // Unknown.
	O2O            // One to one / has one.
	O2M            // One to many / has many.
	M2O            // Many to one (inverse perspective for O2M).
	M2M            // Many to many.
)

Relation types.

func (Rel) String 

func (r Rel) String() string

String returns the relation name.

type Relation 

type Relation struct {
	// Type holds the relation type of the edge.
	Type Rel
	// Table holds the relation table for this edge.
	// For O2O and O2M, it's the table name of the type we're this edge point to.
	// For M2O, this is the owner's type, and for M2M this is the join table.
	Table string
	// Columns holds the relation column in the relation table above.
	// In O2M, M2O and O2O, this the first element.
	Columns []string
	// contains filtered or unexported fields
}

Relation holds the relational database information for edges.

func (Relation) Column 

func (r Relation) Column() string

Column returns the first element from the columns slice.

type SchemaMode 

type SchemaMode uint

A SchemaMode defines what type of schema feature a storage driver support. 

const (
	// Unique defines field and edge uniqueness support.
	Unique SchemaMode = 1 << iota

	// Indexes defines indexes support.
	Indexes

	// Cascade defines cascading operations (e.g. cascade deletion).
	Cascade

	// Migrate defines static schema and migration support (e.g. SQL-based).
	Migrate
)

func (SchemaMode) Support 

func (m SchemaMode) Support(mode SchemaMode) bool

Support reports whether m support the given mode.

type Snapshot 

type Snapshot struct {
	Schema   string
	Package  string
	Schemas  []*load.Schema
	Features []string
}

Snapshot holds the information for storing the schema snapshot.

type Storage 

type Storage struct {
	Name       string            // storage name.
	Builder    reflect.Type      // query builder type.
	Dialects   []string          // supported dialects.
	IdentName  string            // identifier name (fields and funcs).
	Imports    []string          // import packages needed.
	SchemaMode SchemaMode        // schema mode support.
	Ops        func(*Field) []Op // storage specific operations.
	OpCode     func(Op) string   // operation code for predicates.
}

Storage driver type for codegen.

func NewStorage 

func NewStorage(s string) (*Storage, error)

NewStorage returns a the storage driver type from the given string. It fails if the provided string is not a valid option. this function is here in order to remove the validation logic from entc command line.

func (*Storage) String 

func (s *Storage) String() string

String implements the fmt.Stringer interface for template usage.

type Template 

type Template struct {
	*template.Template
	FuncMap template.FuncMap
}

Template wraps the standard template.Template to provide additional functionality for ent extensions.

func MustParse 

func MustParse(t *Template, err error) *Template

MustParse is a helper that wraps a call to a function returning (*Template, error) and panics if the error is non-nil.

func NewTemplate 

func NewTemplate(name string) *Template

NewTemplate creates an empty template with the standard codegen functions.

func (*Template) AddParseTree 

func (t *Template) AddParseTree(name string, tree *parse.Tree) (*Template, error)

AddParseTree adds the given parse tree to the template.

func (*Template) Funcs 

func (t *Template) Funcs(funcMap template.FuncMap) *Template

Funcs merges the given funcMap with the template functions.

func (*Template) Parse 

func (t *Template) Parse(text string) (*Template, error)

Parse parses text as a template body for t.

func (*Template) ParseDir 

func (t *Template) ParseDir(path string) (*Template, error)

ParseDir walks on the given dir path and parses the given matches with aren't Go files.

func (*Template) ParseFS 

func (t *Template) ParseFS(fsys fs.FS, patterns ...string) (*Template, error)

ParseFS is like ParseFiles or ParseGlob but reads from the file system fsys instead of the host operating system's file system.

func (*Template) ParseFiles 

func (t *Template) ParseFiles(filenames ...string) (*Template, error)

ParseFiles parses a list of files as templates and associate them with t. Each file can be a standalone template.

func (*Template) ParseGlob 

func (t *Template) ParseGlob(pattern string) (*Template, error)

ParseGlob parses the files that match the given pattern as templates and associate them with t.

type Type 

type Type struct {
	*Config

	// Name holds the type/ent name.
	Name string

	// ID holds the ID field of this type.
	ID *Field
	// Fields holds all the primitive fields of this type.
	Fields []*Field

	// Edge holds all the edges of this type.
	Edges []*Edge
	// Indexes are the configured indexes for this type.
	Indexes []*Index
	// ForeignKeys are the foreign-keys that resides in the type table.
	ForeignKeys []*ForeignKey

	// Annotations that were defined for the field in the schema.
	// The mapping is from the Annotation.Name() to a JSON decoded object.
	Annotations Annotations
	// contains filtered or unexported fields
}

Type represents one node-type in the graph, its relations and the information it holds.

func NewType 

func NewType(c *Config, schema *load.Schema) (*Type, error)

NewType creates a new type and its fields from the given schema.

func (*Type) AddIndex 

func (t *Type) AddIndex(idx *load.Index) error

AddIndex adds a new index for the type. It fails if the schema index is invalid.

func (Type) CreateBulkName 

func (t Type) CreateBulkName() string

CreateBulkName returns the struct name denoting the create-bulk-builder for this type.

func (Type) CreateName 

func (t Type) CreateName() string

CreateName returns the struct name denoting the create-builder for this type.

func (Type) DeleteName 

func (t Type) DeleteName() string

DeleteName returns the struct name denoting the delete-builder for this type.

func (Type) DeleteOneName 

func (t Type) DeleteOneName() string

DeleteOneName returns the struct name denoting the delete-one-builder for this type.

func (Type) EntSQL 

func (t Type) EntSQL() *entsql.Annotation

EntSQL returns the EntSQL annotation if exists.

func (Type) EnumFields 

func (t Type) EnumFields() []*Field

EnumFields returns the enum fields of the schema, if any.

func (Type) FKEdges 

func (t Type) FKEdges() (edges []*Edge)

FKEdges returns all edges that reside on the type table as foreign-keys.

func (Type) FieldBy 

func (t Type) FieldBy(fn func(*Field) bool) (*Field, bool)

FieldBy returns the first field that the given function returns true on it.

func (Type) FilterName 

func (t Type) FilterName() string

FilterName returns the struct name denoting the filter-builder for this type.

func (Type) HasAssoc 

func (t Type) HasAssoc(name string) (*Edge, bool)

HasAssoc returns true if this type has an assoc-edge (edge.To) with the given name. faster than map access for most cases.

func (Type) HasDefault 

func (t Type) HasDefault() bool

HasDefault reports if any of this type's fields has default value on creation.

func (Type) HasNumeric 

func (t Type) HasNumeric() bool

HasNumeric reports if this type has a numeric field.

func (Type) HasOptional 

func (t Type) HasOptional() bool

HasOptional reports if this type has an optional field.

func (Type) HasUpdateCheckers 

func (t Type) HasUpdateCheckers() bool

HasUpdateCheckers reports if this type has any checkers to run on update(one).

func (Type) HasUpdateDefault 

func (t Type) HasUpdateDefault() bool

HasUpdateDefault reports if any of this type's fields has default value on update.

func (Type) HasValidators 

func (t Type) HasValidators() bool

HasValidators reports if any of the type's field has validators.

func (Type) HookPositions 

func (t Type) HookPositions() []*load.Position

HookPositions returns the position information of hooks declared in the type schema.

func (Type) ImmutableFields 

func (t Type) ImmutableFields() []*Field

ImmutableFields returns all type fields that are immutable (for update).

func (Type) Label 

func (t Type) Label() string

Label returns Gremlin label name of the node/type.

func (Type) MixedInFields 

func (t Type) MixedInFields() []int

MixedInFields returns the indices of mixin holds runtime code.

func (Type) MixedInHooks 

func (t Type) MixedInHooks() []int

MixedInHooks returns the indices of mixin with hooks.

func (Type) MixedInPolicies 

func (t Type) MixedInPolicies() []int

MixedInPolicies returns the indices of mixin with policies.

func (Type) MutableFields 

func (t Type) MutableFields() []*Field

MutableFields returns all type fields that are mutable (on update).

func (Type) MutationFields 

func (t Type) MutationFields() []*Field

MutationFields returns all the fields that are available on the typed-mutation.

func (Type) MutationName 

func (t Type) MutationName() string

MutationName returns the struct name of the mutation builder for this type.

func (Type) NumConstraint 

func (t Type) NumConstraint() int

NumConstraint returns the type's constraint count. Used for slice allocation.

func (Type) NumHooks 

func (t Type) NumHooks() int

NumHooks returns the number of hooks declared in the type schema.

func (Type) NumM2M 

func (t Type) NumM2M() int

NumM2M returns the type's many-to-many edge count

func (Type) NumMixin 

func (t Type) NumMixin() int

NumMixin returns the type's mixin count.

func (Type) NumPolicy 

func (t Type) NumPolicy() int

NumPolicy returns the number of privacy-policy declared in the type schema.

func (Type) Package 

func (t Type) Package() string

Package returns the package name of this node.

func (Type) PackageAlias 

func (t Type) PackageAlias() string

PackageAlias returns local package name of a type if there is one. A package has an alias if its generated name conflicts with one of the imports of the user-defined types.

func (Type) PackageDir 

func (t Type) PackageDir() string

PackageDir returns the name of the package directory.

func (Type) PolicyPositions 

func (t Type) PolicyPositions() []*load.Position

PolicyPositions returns the position information of privacy policy declared in the type schema.

func (Type) QueryName 

func (t Type) QueryName() string

QueryName returns the struct name denoting the query-builder for this type.

func (Type) Receiver 

func (t Type) Receiver() string

Receiver returns the receiver name of this node. It makes sure the receiver names doesn't conflict with import names.

func (Type) RelatedTypes 

func (t Type) RelatedTypes() []*Type

RelatedTypes returns all the types (nodes) that are related (with edges) to this type.

func (Type) RuntimeMixin 

func (t Type) RuntimeMixin() bool

RuntimeMixin returns schema mixin that needs to be loaded at runtime. For example, for default values, validators or hooks.

func (Type) SiblingImports 

func (t Type) SiblingImports() []struct{ Alias, Path string }

SiblingImports returns all sibling packages that are needed for the different builders.

func (Type) Table 

func (t Type) Table() string

Table returns SQL table name of the node/type.

func (Type) TagTypes 

func (t Type) TagTypes() []string

TagTypes returns all struct-tag types of the type fields.

func (Type) UnexportedForeignKeys 

func (t Type) UnexportedForeignKeys() []*ForeignKey

UnexportedForeignKeys returns all foreign-keys that belong to the type but are not exported (not defined with field). i.e. generated by ent.

func (Type) UpdateName 

func (t Type) UpdateName() string

UpdateName returns the struct name denoting the update-builder for this type.

func (Type) UpdateOneName 

func (t Type) UpdateOneName() string

UpdateOneName returns the struct name denoting the update-one-builder for this type.

type TypeTemplate 

type TypeTemplate struct {
	Name           string             // template name.
	Format         func(*Type) string // file name format.
	ExtendPatterns []string           // extend patterns.
}

TypeTemplate specifies a template that is executed with each Type object of the graph.

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