ent

package
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 Go to latest Published: Dec 13, 2020 License: Apache-2.0 Imports: 16 Imported by: 0

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Index

Constants

View Source 
const (
	// Operation types.
	OpCreate    = ent.OpCreate
	OpDelete    = ent.OpDelete
	OpDeleteOne = ent.OpDeleteOne
	OpUpdate    = ent.OpUpdate
	OpUpdateOne = ent.OpUpdateOne

	// Node types.
	TypeNode = "Node"
)

Variables

This section is empty.

Functions

func IsConstraintError 

func IsConstraintError(err error) bool

IsConstraintError returns a boolean indicating whether the error is a constraint failure.

func IsNotFound 

func IsNotFound(err error) bool

IsNotFound returns a boolean indicating whether the error is a not found error.

func IsNotLoaded 

func IsNotLoaded(err error) bool

IsNotLoaded returns a boolean indicating whether the error is a not loaded error.

func IsNotSingular 

func IsNotSingular(err error) bool

IsNotSingular returns a boolean indicating whether the error is a not singular error.

func IsValidationError 

func IsValidationError(err error) bool

IsValidationError returns a boolean indicating whether the error is a validaton error.

func MaskNotFound 

func MaskNotFound(err error) error

MaskNotFound masks not found error.

func NewContext 

func NewContext(parent context.Context, c *Client) context.Context

NewContext returns a new context with the given Client attached.

func NewTxContext 

func NewTxContext(parent context.Context, tx *Tx) context.Context

NewTxContext returns a new context with the given Client attached.

Types

type AggregateFunc 

type AggregateFunc func(*sql.Selector, func(string) bool) string

AggregateFunc applies an aggregation step on the group-by traversal/selector.

func As 

func As(fn AggregateFunc, end string) AggregateFunc

As is a pseudo aggregation function for renaming another other functions with custom names. For example: 

GroupBy(field1, field2).
Aggregate(ent.As(ent.Sum(field1), "sum_field1"), (ent.As(ent.Sum(field2), "sum_field2")).
Scan(ctx, &v)

func Count 

func Count() AggregateFunc

Count applies the "count" aggregation function on each group.

func Max 

func Max(field string) AggregateFunc

Max applies the "max" aggregation function on the given field of each group.

func Mean 

func Mean(field string) AggregateFunc

Mean applies the "mean" aggregation function on the given field of each group.

func Min 

func Min(field string) AggregateFunc

Min applies the "min" aggregation function on the given field of each group.

func Sum 

func Sum(field string) AggregateFunc

Sum applies the "sum" aggregation function on the given field of each group.

type Client 

type Client struct {

	// Schema is the client for creating, migrating and dropping schema.
	Schema *migrate.Schema
	// Node is the client for interacting with the Node builders.
	Node *NodeClient
	// contains filtered or unexported fields
}

Client is the client that holds all ent builders.

func FromContext 

func FromContext(ctx context.Context) *Client

FromContext returns the Client stored in a context, or nil if there isn't one.

func NewClient 

func NewClient(opts ...Option) *Client

NewClient creates a new client configured with the given options.

func Open 

func Open(driverName, dataSourceName string, options ...Option) (*Client, error)

Open opens a database/sql.DB specified by the driver name and the data source name, and returns a new client attached to it. Optional parameters can be added for configuring the client.

func (*Client) BeginTx 

func (c *Client) BeginTx(ctx context.Context, opts *sql.TxOptions) (*Tx, error)

BeginTx returns a transactional client with options.

func (*Client) Close 

func (c *Client) Close() error

Close closes the database connection and prevents new queries from starting.

func (*Client) Debug 

func (c *Client) Debug() *Client

Debug returns a new debug-client. It's used to get verbose logging on specific operations. 

client.Debug().
	Node.
	Query().
	Count(ctx)

func (*Client) Tx 

func (c *Client) Tx(ctx context.Context) (*Tx, error)

Tx returns a new transactional client. The provided context is used until the transaction is committed or rolled back.

func (*Client) Use 

func (c *Client) Use(hooks ...Hook)

Use adds the mutation hooks to all the entity clients. In order to add hooks to a specific client, call: `client.Node.Use(...)`.

type CommitFunc 

type CommitFunc func(context.Context, *Tx) error

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

func (CommitFunc) Commit 

func (f CommitFunc) Commit(ctx context.Context, tx *Tx) error

Commit calls f(ctx, m).

type CommitHook 

type CommitHook func(Committer) Committer

CommitHook defines the "commit middleware". A function that gets a Committer and returns a Committer. For example: 

hook := func(next ent.Committer) ent.Committer {
	return ent.CommitFunc(func(context.Context, tx *ent.Tx) error {
		// Do some stuff before.
		if err := next.Commit(ctx, tx); err != nil {
			return err
		}
		// Do some stuff after.
		return nil
	})
}

type Committer 

type Committer interface {
	Commit(context.Context, *Tx) error
}

Committer is the interface that wraps the Committer method.

type ConstraintError 

type ConstraintError struct {
	// contains filtered or unexported fields
}

ConstraintError returns when trying to create/update one or more entities and one or more of their constraints failed. For example, violation of edge or field uniqueness.

func (ConstraintError) Error 

func (e ConstraintError) Error() string

Error implements the error interface.

func (*ConstraintError) Unwrap 

func (e *ConstraintError) Unwrap() error

Unwrap implements the errors.Wrapper interface.

type Hook 

type Hook = ent.Hook

ent aliases to avoid import conflict in user's code.

type MutateFunc 

type MutateFunc = ent.MutateFunc

ent aliases to avoid import conflict in user's code.

type Mutation 

type Mutation = ent.Mutation

ent aliases to avoid import conflict in user's code.

type Mutator 

type Mutator = ent.Mutator

ent aliases to avoid import conflict in user's code.

type Node 

type Node struct {

	// ID of the ent.
	ID int `json:"id,omitempty"`
	// Value holds the value of the "value" field.
	Value int `json:"value,omitempty"`
	// Edges holds the relations/edges for other nodes in the graph.
	// The values are being populated by the NodeQuery when eager-loading is set.
	Edges NodeEdges `json:"edges"`
	// contains filtered or unexported fields
}

Node is the model entity for the Node schema.

func (*Node) QueryNext 

func (n *Node) QueryNext() *NodeQuery

QueryNext queries the next edge of the Node.

func (*Node) QueryPrev 

func (n *Node) QueryPrev() *NodeQuery

QueryPrev queries the prev edge of the Node.

func (*Node) String 

func (n *Node) String() string

String implements the fmt.Stringer.

func (*Node) Unwrap 

func (n *Node) Unwrap() *Node

Unwrap unwraps the entity that was returned from a transaction after it was closed, so that all next queries will be executed through the driver which created the transaction.

func (*Node) Update 

func (n *Node) Update() *NodeUpdateOne

Update returns a builder for updating this Node. Note that, you need to call Node.Unwrap() before calling this method, if this Node was returned from a transaction, and the transaction was committed or rolled back.

type NodeClient 

type NodeClient struct {
	// contains filtered or unexported fields
}

NodeClient is a client for the Node schema.

func NewNodeClient 

func NewNodeClient(c config) *NodeClient

NewNodeClient returns a client for the Node from the given config.

func (*NodeClient) Create 

func (c *NodeClient) Create() *NodeCreate

Create returns a create builder for Node.

func (*NodeClient) CreateBulk 

func (c *NodeClient) CreateBulk(builders ...*NodeCreate) *NodeCreateBulk

CreateBulk returns a builder for creating a bulk of Node entities.

func (*NodeClient) Delete 

func (c *NodeClient) Delete() *NodeDelete

Delete returns a delete builder for Node.

func (*NodeClient) DeleteOne 

func (c *NodeClient) DeleteOne(n *Node) *NodeDeleteOne

DeleteOne returns a delete builder for the given entity.

func (*NodeClient) DeleteOneID 

func (c *NodeClient) DeleteOneID(id int) *NodeDeleteOne

DeleteOneID returns a delete builder for the given id.

func (*NodeClient) Get 

func (c *NodeClient) Get(ctx context.Context, id int) (*Node, error)

Get returns a Node entity by its id.

func (*NodeClient) GetX 

func (c *NodeClient) GetX(ctx context.Context, id int) *Node

GetX is like Get, but panics if an error occurs.

func (*NodeClient) Hooks 

func (c *NodeClient) Hooks() []Hook

Hooks returns the client hooks.

func (*NodeClient) Query 

func (c *NodeClient) Query() *NodeQuery

Query returns a query builder for Node.

func (*NodeClient) QueryNext 

func (c *NodeClient) QueryNext(n *Node) *NodeQuery

QueryNext queries the next edge of a Node.

func (*NodeClient) QueryPrev 

func (c *NodeClient) QueryPrev(n *Node) *NodeQuery

QueryPrev queries the prev edge of a Node.

func (*NodeClient) Update 

func (c *NodeClient) Update() *NodeUpdate

Update returns an update builder for Node.

func (*NodeClient) UpdateOne 

func (c *NodeClient) UpdateOne(n *Node) *NodeUpdateOne

UpdateOne returns an update builder for the given entity.

func (*NodeClient) UpdateOneID 

func (c *NodeClient) UpdateOneID(id int) *NodeUpdateOne

UpdateOneID returns an update builder for the given id.

func (*NodeClient) Use 

func (c *NodeClient) Use(hooks ...Hook)

Use adds a list of mutation hooks to the hooks stack. A call to `Use(f, g, h)` equals to `node.Hooks(f(g(h())))`.

type NodeCreate 

type NodeCreate struct {
	// contains filtered or unexported fields
}

NodeCreate is the builder for creating a Node entity.

func (*NodeCreate) Mutation 

func (nc *NodeCreate) Mutation() *NodeMutation

Mutation returns the NodeMutation object of the builder.

func (*NodeCreate) Save 

func (nc *NodeCreate) Save(ctx context.Context) (*Node, error)

Save creates the Node in the database.

func (*NodeCreate) SaveX 

func (nc *NodeCreate) SaveX(ctx context.Context) *Node

SaveX calls Save and panics if Save returns an error.

func (*NodeCreate) SetNext 

func (nc *NodeCreate) SetNext(n *Node) *NodeCreate

SetNext sets the next edge to Node.

func (*NodeCreate) SetNextID 

func (nc *NodeCreate) SetNextID(id int) *NodeCreate

SetNextID sets the next edge to Node by id.

func (*NodeCreate) SetNillableNextID 

func (nc *NodeCreate) SetNillableNextID(id *int) *NodeCreate

SetNillableNextID sets the next edge to Node by id if the given value is not nil.

func (*NodeCreate) SetNillablePrevID 

func (nc *NodeCreate) SetNillablePrevID(id *int) *NodeCreate

SetNillablePrevID sets the prev edge to Node by id if the given value is not nil.

func (*NodeCreate) SetPrev 

func (nc *NodeCreate) SetPrev(n *Node) *NodeCreate

SetPrev sets the prev edge to Node.

func (*NodeCreate) SetPrevID 

func (nc *NodeCreate) SetPrevID(id int) *NodeCreate

SetPrevID sets the prev edge to Node by id.

func (*NodeCreate) SetValue 

func (nc *NodeCreate) SetValue(i int) *NodeCreate

SetValue sets the value field.

type NodeCreateBulk 

type NodeCreateBulk struct {
	// contains filtered or unexported fields
}

NodeCreateBulk is the builder for creating a bulk of Node entities.

func (*NodeCreateBulk) Save 

func (ncb *NodeCreateBulk) Save(ctx context.Context) ([]*Node, error)

Save creates the Node entities in the database.

func (*NodeCreateBulk) SaveX 

func (ncb *NodeCreateBulk) SaveX(ctx context.Context) []*Node

SaveX calls Save and panics if Save returns an error.

type NodeDelete 

type NodeDelete struct {
	// contains filtered or unexported fields
}

NodeDelete is the builder for deleting a Node entity.

func (*NodeDelete) Exec 

func (nd *NodeDelete) Exec(ctx context.Context) (int, error)

Exec executes the deletion query and returns how many vertices were deleted.

func (*NodeDelete) ExecX 

func (nd *NodeDelete) ExecX(ctx context.Context) int

ExecX is like Exec, but panics if an error occurs.

func (*NodeDelete) Where 

func (nd *NodeDelete) Where(ps ...predicate.Node) *NodeDelete

Where adds a new predicate to the delete builder.

type NodeDeleteOne 

type NodeDeleteOne struct {
	// contains filtered or unexported fields
}

NodeDeleteOne is the builder for deleting a single Node entity.

func (*NodeDeleteOne) Exec 

func (ndo *NodeDeleteOne) Exec(ctx context.Context) error

Exec executes the deletion query.

func (*NodeDeleteOne) ExecX 

func (ndo *NodeDeleteOne) ExecX(ctx context.Context)

ExecX is like Exec, but panics if an error occurs.

type NodeEdges 

type NodeEdges struct {
	// Prev holds the value of the prev edge.
	Prev *Node
	// Next holds the value of the next edge.
	Next *Node
	// contains filtered or unexported fields
}

NodeEdges holds the relations/edges for other nodes in the graph.

func (NodeEdges) NextOrErr 

func (e NodeEdges) NextOrErr() (*Node, error)

NextOrErr returns the Next value or an error if the edge was not loaded in eager-loading, or loaded but was not found.

func (NodeEdges) PrevOrErr 

func (e NodeEdges) PrevOrErr() (*Node, error)

PrevOrErr returns the Prev value or an error if the edge was not loaded in eager-loading, or loaded but was not found.

type NodeGroupBy 

type NodeGroupBy struct {
	// contains filtered or unexported fields
}

NodeGroupBy is the builder for group-by Node entities.

func (*NodeGroupBy) Aggregate 

func (ngb *NodeGroupBy) Aggregate(fns ...AggregateFunc) *NodeGroupBy

Aggregate adds the given aggregation functions to the group-by query.

func (*NodeGroupBy) Bool 

func (ngb *NodeGroupBy) Bool(ctx context.Context) (_ bool, err error)

Bool returns a single bool from group-by. It is only allowed when querying group-by with one field.

func (*NodeGroupBy) BoolX 

func (ngb *NodeGroupBy) BoolX(ctx context.Context) bool

BoolX is like Bool, but panics if an error occurs.

func (*NodeGroupBy) Bools 

func (ngb *NodeGroupBy) Bools(ctx context.Context) ([]bool, error)

Bools returns list of bools from group-by. It is only allowed when querying group-by with one field.

func (*NodeGroupBy) BoolsX 

func (ngb *NodeGroupBy) BoolsX(ctx context.Context) []bool

BoolsX is like Bools, but panics if an error occurs.

func (*NodeGroupBy) Float64 

func (ngb *NodeGroupBy) Float64(ctx context.Context) (_ float64, err error)

Float64 returns a single float64 from group-by. It is only allowed when querying group-by with one field.

func (*NodeGroupBy) Float64X 

func (ngb *NodeGroupBy) Float64X(ctx context.Context) float64

Float64X is like Float64, but panics if an error occurs.

func (*NodeGroupBy) Float64s 

func (ngb *NodeGroupBy) Float64s(ctx context.Context) ([]float64, error)

Float64s returns list of float64s from group-by. It is only allowed when querying group-by with one field.

func (*NodeGroupBy) Float64sX 

func (ngb *NodeGroupBy) Float64sX(ctx context.Context) []float64

Float64sX is like Float64s, but panics if an error occurs.

func (*NodeGroupBy) Int 

func (ngb *NodeGroupBy) Int(ctx context.Context) (_ int, err error)

Int returns a single int from group-by. It is only allowed when querying group-by with one field.

func (*NodeGroupBy) IntX 

func (ngb *NodeGroupBy) IntX(ctx context.Context) int

IntX is like Int, but panics if an error occurs.

func (*NodeGroupBy) Ints 

func (ngb *NodeGroupBy) Ints(ctx context.Context) ([]int, error)

Ints returns list of ints from group-by. It is only allowed when querying group-by with one field.

func (*NodeGroupBy) IntsX 

func (ngb *NodeGroupBy) IntsX(ctx context.Context) []int

IntsX is like Ints, but panics if an error occurs.

func (*NodeGroupBy) Scan 

func (ngb *NodeGroupBy) Scan(ctx context.Context, v interface{}) error

Scan applies the group-by query and scan the result into the given value.

func (*NodeGroupBy) ScanX 

func (ngb *NodeGroupBy) ScanX(ctx context.Context, v interface{})

ScanX is like Scan, but panics if an error occurs.

func (*NodeGroupBy) String 

func (ngb *NodeGroupBy) String(ctx context.Context) (_ string, err error)

String returns a single string from group-by. It is only allowed when querying group-by with one field.

func (*NodeGroupBy) StringX 

func (ngb *NodeGroupBy) StringX(ctx context.Context) string

StringX is like String, but panics if an error occurs.

func (*NodeGroupBy) Strings 

func (ngb *NodeGroupBy) Strings(ctx context.Context) ([]string, error)

Strings returns list of strings from group-by. It is only allowed when querying group-by with one field.

func (*NodeGroupBy) StringsX 

func (ngb *NodeGroupBy) StringsX(ctx context.Context) []string

StringsX is like Strings, but panics if an error occurs.

type NodeMutation 

type NodeMutation struct {
	// contains filtered or unexported fields
}

NodeMutation represents an operation that mutate the Nodes nodes in the graph.

func (*NodeMutation) AddField 

func (m *NodeMutation) AddField(name string, value ent.Value) error

AddField adds the value for the given name. It returns an error if the field is not defined in the schema, or if the type mismatch the field type.

func (*NodeMutation) AddValue 

func (m *NodeMutation) AddValue(i int)

AddValue adds i to value.

func (*NodeMutation) AddedEdges 

func (m *NodeMutation) AddedEdges() []string

AddedEdges returns all edge names that were set/added in this mutation.

func (*NodeMutation) AddedField 

func (m *NodeMutation) AddedField(name string) (ent.Value, bool)

AddedField returns the numeric value that was in/decremented from a field with the given name. The second value indicates that this field was not set, or was not define in the schema.

func (*NodeMutation) AddedFields 

func (m *NodeMutation) AddedFields() []string

AddedFields returns all numeric fields that were incremented or decremented during this mutation.

func (*NodeMutation) AddedIDs 

func (m *NodeMutation) AddedIDs(name string) []ent.Value

AddedIDs returns all ids (to other nodes) that were added for the given edge name.

func (*NodeMutation) AddedValue 

func (m *NodeMutation) AddedValue() (r int, exists bool)

AddedValue returns the value that was added to the value field in this mutation.

func (*NodeMutation) ClearEdge 

func (m *NodeMutation) ClearEdge(name string) error

ClearEdge clears the value for the given name. It returns an error if the edge name is not defined in the schema.

func (*NodeMutation) ClearField 

func (m *NodeMutation) ClearField(name string) error

ClearField clears the value for the given name. It returns an error if the field is not defined in the schema.

func (*NodeMutation) ClearNext 

func (m *NodeMutation) ClearNext()

ClearNext clears the next edge to Node.

func (*NodeMutation) ClearPrev 

func (m *NodeMutation) ClearPrev()

ClearPrev clears the prev edge to Node.

func (*NodeMutation) ClearedEdges 

func (m *NodeMutation) ClearedEdges() []string

ClearedEdges returns all edge names that were cleared in this mutation.

func (*NodeMutation) ClearedFields 

func (m *NodeMutation) ClearedFields() []string

ClearedFields returns all nullable fields that were cleared during this mutation.

func (NodeMutation) Client 

func (m NodeMutation) Client() *Client

Client returns a new `ent.Client` from the mutation. If the mutation was executed in a transaction (ent.Tx), a transactional client is returned.

func (*NodeMutation) EdgeCleared 

func (m *NodeMutation) EdgeCleared(name string) bool

EdgeCleared returns a boolean indicates if this edge was cleared in this mutation.

func (*NodeMutation) Field 

func (m *NodeMutation) Field(name string) (ent.Value, bool)

Field returns the value of a field with the given name. The second boolean value indicates that this field was not set, or was not define in the schema.

func (*NodeMutation) FieldCleared 

func (m *NodeMutation) FieldCleared(name string) bool

FieldCleared returns a boolean indicates if this field was cleared in this mutation.

func (*NodeMutation) Fields 

func (m *NodeMutation) Fields() []string

Fields returns all fields that were changed during this mutation. Note that, in order to get all numeric fields that were in/decremented, call AddedFields().

func (*NodeMutation) ID 

func (m *NodeMutation) ID() (id int, exists bool)

ID returns the id value in the mutation. Note that, the id is available only if it was provided to the builder.

func (*NodeMutation) NextCleared 

func (m *NodeMutation) NextCleared() bool

NextCleared returns if the edge next was cleared.

func (*NodeMutation) NextID 

func (m *NodeMutation) NextID() (id int, exists bool)

NextID returns the next id in the mutation.

func (*NodeMutation) NextIDs 

func (m *NodeMutation) NextIDs() (ids []int)

NextIDs returns the next ids in the mutation. Note that ids always returns len(ids) <= 1 for unique edges, and you should use NextID instead. It exists only for internal usage by the builders.

func (*NodeMutation) OldField 

func (m *NodeMutation) OldField(ctx context.Context, name string) (ent.Value, error)

OldField returns the old value of the field from the database. An error is returned if the mutation operation is not UpdateOne, or the query to the database was failed.

func (*NodeMutation) OldValue 

func (m *NodeMutation) OldValue(ctx context.Context) (v int, err error)

OldValue returns the old value value of the Node. If the Node object wasn't provided to the builder, the object is fetched from the database. An error is returned if the mutation operation is not UpdateOne, or database query fails.

func (*NodeMutation) Op 

func (m *NodeMutation) Op() Op

Op returns the operation name.

func (*NodeMutation) PrevCleared 

func (m *NodeMutation) PrevCleared() bool

PrevCleared returns if the edge prev was cleared.

func (*NodeMutation) PrevID 

func (m *NodeMutation) PrevID() (id int, exists bool)

PrevID returns the prev id in the mutation.

func (*NodeMutation) PrevIDs 

func (m *NodeMutation) PrevIDs() (ids []int)

PrevIDs returns the prev ids in the mutation. Note that ids always returns len(ids) <= 1 for unique edges, and you should use PrevID instead. It exists only for internal usage by the builders.

func (*NodeMutation) RemovedEdges 

func (m *NodeMutation) RemovedEdges() []string

RemovedEdges returns all edge names that were removed in this mutation.

func (*NodeMutation) RemovedIDs 

func (m *NodeMutation) RemovedIDs(name string) []ent.Value

RemovedIDs returns all ids (to other nodes) that were removed for the given edge name.

func (*NodeMutation) ResetEdge 

func (m *NodeMutation) ResetEdge(name string) error

ResetEdge resets all changes in the mutation regarding the given edge name. It returns an error if the edge is not defined in the schema.

func (*NodeMutation) ResetField 

func (m *NodeMutation) ResetField(name string) error

ResetField resets all changes in the mutation regarding the given field name. It returns an error if the field is not defined in the schema.

func (*NodeMutation) ResetNext 

func (m *NodeMutation) ResetNext()

ResetNext reset all changes of the "next" edge.

func (*NodeMutation) ResetPrev 

func (m *NodeMutation) ResetPrev()

ResetPrev reset all changes of the "prev" edge.

func (*NodeMutation) ResetValue 

func (m *NodeMutation) ResetValue()

ResetValue reset all changes of the "value" field.

func (*NodeMutation) SetField 

func (m *NodeMutation) SetField(name string, value ent.Value) error

SetField sets the value for the given name. It returns an error if the field is not defined in the schema, or if the type mismatch the field type.

func (*NodeMutation) SetNextID 

func (m *NodeMutation) SetNextID(id int)

SetNextID sets the next edge to Node by id.

func (*NodeMutation) SetPrevID 

func (m *NodeMutation) SetPrevID(id int)

SetPrevID sets the prev edge to Node by id.

func (*NodeMutation) SetValue 

func (m *NodeMutation) SetValue(i int)

SetValue sets the value field.

func (NodeMutation) Tx 

func (m NodeMutation) Tx() (*Tx, error)

Tx returns an `ent.Tx` for mutations that were executed in transactions; it returns an error otherwise.

func (*NodeMutation) Type 

func (m *NodeMutation) Type() string

Type returns the node type of this mutation (Node).

func (*NodeMutation) Value 

func (m *NodeMutation) Value() (r int, exists bool)

Value returns the value value in the mutation.

type NodeQuery 

type NodeQuery struct {
	// contains filtered or unexported fields
}

NodeQuery is the builder for querying Node entities.

func (*NodeQuery) All 

func (nq *NodeQuery) All(ctx context.Context) ([]*Node, error)

All executes the query and returns a list of Nodes.

func (*NodeQuery) AllX 

func (nq *NodeQuery) AllX(ctx context.Context) []*Node

AllX is like All, but panics if an error occurs.

func (*NodeQuery) Clone 

func (nq *NodeQuery) Clone() *NodeQuery

Clone returns a duplicate of the query builder, including all associated steps. It can be used to prepare common query builders and use them differently after the clone is made.

func (*NodeQuery) Count 

func (nq *NodeQuery) Count(ctx context.Context) (int, error)

Count returns the count of the given query.

func (*NodeQuery) CountX 

func (nq *NodeQuery) CountX(ctx context.Context) int

CountX is like Count, but panics if an error occurs.

func (*NodeQuery) Exist 

func (nq *NodeQuery) Exist(ctx context.Context) (bool, error)

Exist returns true if the query has elements in the graph.

func (*NodeQuery) ExistX 

func (nq *NodeQuery) ExistX(ctx context.Context) bool

ExistX is like Exist, but panics if an error occurs.

func (*NodeQuery) First 

func (nq *NodeQuery) First(ctx context.Context) (*Node, error)

First returns the first Node entity in the query. Returns *NotFoundError when no node was found.

func (*NodeQuery) FirstID 

func (nq *NodeQuery) FirstID(ctx context.Context) (id int, err error)

FirstID returns the first Node id in the query. Returns *NotFoundError when no id was found.

func (*NodeQuery) FirstIDX added in v0.5.0 

func (nq *NodeQuery) FirstIDX(ctx context.Context) int

FirstIDX is like FirstID, but panics if an error occurs.

func (*NodeQuery) FirstX 

func (nq *NodeQuery) FirstX(ctx context.Context) *Node

FirstX is like First, but panics if an error occurs.

func (*NodeQuery) GroupBy 

func (nq *NodeQuery) GroupBy(field string, fields ...string) *NodeGroupBy

GroupBy used to group vertices by one or more fields/columns. It is often used with aggregate functions, like: count, max, mean, min, sum.

Example: 

var v []struct {
	Value int `json:"value,omitempty"`
	Count int `json:"count,omitempty"`
}

client.Node.Query().
	GroupBy(node.FieldValue).
	Aggregate(ent.Count()).
	Scan(ctx, &v)

func (*NodeQuery) IDs 

func (nq *NodeQuery) IDs(ctx context.Context) ([]int, error)

IDs executes the query and returns a list of Node ids.

func (*NodeQuery) IDsX 

func (nq *NodeQuery) IDsX(ctx context.Context) []int

IDsX is like IDs, but panics if an error occurs.

func (*NodeQuery) Limit 

func (nq *NodeQuery) Limit(limit int) *NodeQuery

Limit adds a limit step to the query.

func (*NodeQuery) Offset 

func (nq *NodeQuery) Offset(offset int) *NodeQuery

Offset adds an offset step to the query.

func (*NodeQuery) Only 

func (nq *NodeQuery) Only(ctx context.Context) (*Node, error)

Only returns the only Node entity in the query, returns an error if not exactly one entity was returned.

func (*NodeQuery) OnlyID 

func (nq *NodeQuery) OnlyID(ctx context.Context) (id int, err error)

OnlyID returns the only Node id in the query, returns an error if not exactly one id was returned.

func (*NodeQuery) OnlyIDX 

func (nq *NodeQuery) OnlyIDX(ctx context.Context) int

OnlyIDX is like OnlyID, but panics if an error occurs.

func (*NodeQuery) OnlyX 

func (nq *NodeQuery) OnlyX(ctx context.Context) *Node

OnlyX is like Only, but panics if an error occurs.

func (*NodeQuery) Order 

func (nq *NodeQuery) Order(o ...OrderFunc) *NodeQuery

Order adds an order step to the query.

func (*NodeQuery) QueryNext 

func (nq *NodeQuery) QueryNext() *NodeQuery

QueryNext chains the current query on the next edge.

func (*NodeQuery) QueryPrev 

func (nq *NodeQuery) QueryPrev() *NodeQuery

QueryPrev chains the current query on the prev edge.

func (*NodeQuery) Select 

func (nq *NodeQuery) Select(field string, fields ...string) *NodeSelect

Select one or more fields from the given query.

Example: 

var v []struct {
	Value int `json:"value,omitempty"`
}

client.Node.Query().
	Select(node.FieldValue).
	Scan(ctx, &v)

func (*NodeQuery) Where 

func (nq *NodeQuery) Where(ps ...predicate.Node) *NodeQuery

Where adds a new predicate for the builder.

func (*NodeQuery) WithNext 

func (nq *NodeQuery) WithNext(opts ...func(*NodeQuery)) *NodeQuery
WithNext tells the query-builder to eager-loads the nodes that are connected to

the "next" edge. The optional arguments used to configure the query builder of the edge.

func (*NodeQuery) WithPrev 

func (nq *NodeQuery) WithPrev(opts ...func(*NodeQuery)) *NodeQuery
WithPrev tells the query-builder to eager-loads the nodes that are connected to

the "prev" edge. The optional arguments used to configure the query builder of the edge.

type NodeSelect 

type NodeSelect struct {
	// contains filtered or unexported fields
}

NodeSelect is the builder for select fields of Node entities.

func (*NodeSelect) Bool 

func (ns *NodeSelect) Bool(ctx context.Context) (_ bool, err error)

Bool returns a single bool from selector. It is only allowed when selecting one field.

func (*NodeSelect) BoolX 

func (ns *NodeSelect) BoolX(ctx context.Context) bool

BoolX is like Bool, but panics if an error occurs.

func (*NodeSelect) Bools 

func (ns *NodeSelect) Bools(ctx context.Context) ([]bool, error)

Bools returns list of bools from selector. It is only allowed when selecting one field.

func (*NodeSelect) BoolsX 

func (ns *NodeSelect) BoolsX(ctx context.Context) []bool

BoolsX is like Bools, but panics if an error occurs.

func (*NodeSelect) Float64 

func (ns *NodeSelect) Float64(ctx context.Context) (_ float64, err error)

Float64 returns a single float64 from selector. It is only allowed when selecting one field.

func (*NodeSelect) Float64X 

func (ns *NodeSelect) Float64X(ctx context.Context) float64

Float64X is like Float64, but panics if an error occurs.

func (*NodeSelect) Float64s 

func (ns *NodeSelect) Float64s(ctx context.Context) ([]float64, error)

Float64s returns list of float64s from selector. It is only allowed when selecting one field.

func (*NodeSelect) Float64sX 

func (ns *NodeSelect) Float64sX(ctx context.Context) []float64

Float64sX is like Float64s, but panics if an error occurs.

func (*NodeSelect) Int 

func (ns *NodeSelect) Int(ctx context.Context) (_ int, err error)

Int returns a single int from selector. It is only allowed when selecting one field.

func (*NodeSelect) IntX 

func (ns *NodeSelect) IntX(ctx context.Context) int

IntX is like Int, but panics if an error occurs.

func (*NodeSelect) Ints 

func (ns *NodeSelect) Ints(ctx context.Context) ([]int, error)

Ints returns list of ints from selector. It is only allowed when selecting one field.

func (*NodeSelect) IntsX 

func (ns *NodeSelect) IntsX(ctx context.Context) []int

IntsX is like Ints, but panics if an error occurs.

func (*NodeSelect) Scan 

func (ns *NodeSelect) Scan(ctx context.Context, v interface{}) error

Scan applies the selector query and scan the result into the given value.

func (*NodeSelect) ScanX 

func (ns *NodeSelect) ScanX(ctx context.Context, v interface{})

ScanX is like Scan, but panics if an error occurs.

func (*NodeSelect) String 

func (ns *NodeSelect) String(ctx context.Context) (_ string, err error)

String returns a single string from selector. It is only allowed when selecting one field.

func (*NodeSelect) StringX 

func (ns *NodeSelect) StringX(ctx context.Context) string

StringX is like String, but panics if an error occurs.

func (*NodeSelect) Strings 

func (ns *NodeSelect) Strings(ctx context.Context) ([]string, error)

Strings returns list of strings from selector. It is only allowed when selecting one field.

func (*NodeSelect) StringsX 

func (ns *NodeSelect) StringsX(ctx context.Context) []string

StringsX is like Strings, but panics if an error occurs.

type NodeUpdate 

type NodeUpdate struct {
	// contains filtered or unexported fields
}

NodeUpdate is the builder for updating Node entities.

func (*NodeUpdate) AddValue 

func (nu *NodeUpdate) AddValue(i int) *NodeUpdate

AddValue adds i to value.

func (*NodeUpdate) ClearNext 

func (nu *NodeUpdate) ClearNext() *NodeUpdate

ClearNext clears the "next" edge to type Node.

func (*NodeUpdate) ClearPrev 

func (nu *NodeUpdate) ClearPrev() *NodeUpdate

ClearPrev clears the "prev" edge to type Node.

func (*NodeUpdate) Exec 

func (nu *NodeUpdate) Exec(ctx context.Context) error

Exec executes the query.

func (*NodeUpdate) ExecX 

func (nu *NodeUpdate) ExecX(ctx context.Context)

ExecX is like Exec, but panics if an error occurs.

func (*NodeUpdate) Mutation 

func (nu *NodeUpdate) Mutation() *NodeMutation

Mutation returns the NodeMutation object of the builder.

func (*NodeUpdate) Save 

func (nu *NodeUpdate) Save(ctx context.Context) (int, error)

Save executes the query and returns the number of nodes affected by the update operation.

func (*NodeUpdate) SaveX 

func (nu *NodeUpdate) SaveX(ctx context.Context) int

SaveX is like Save, but panics if an error occurs.

func (*NodeUpdate) SetNext 

func (nu *NodeUpdate) SetNext(n *Node) *NodeUpdate

SetNext sets the next edge to Node.

func (*NodeUpdate) SetNextID 

func (nu *NodeUpdate) SetNextID(id int) *NodeUpdate

SetNextID sets the next edge to Node by id.

func (*NodeUpdate) SetNillableNextID 

func (nu *NodeUpdate) SetNillableNextID(id *int) *NodeUpdate

SetNillableNextID sets the next edge to Node by id if the given value is not nil.

func (*NodeUpdate) SetNillablePrevID 

func (nu *NodeUpdate) SetNillablePrevID(id *int) *NodeUpdate

SetNillablePrevID sets the prev edge to Node by id if the given value is not nil.

func (*NodeUpdate) SetPrev 

func (nu *NodeUpdate) SetPrev(n *Node) *NodeUpdate

SetPrev sets the prev edge to Node.

func (*NodeUpdate) SetPrevID 

func (nu *NodeUpdate) SetPrevID(id int) *NodeUpdate

SetPrevID sets the prev edge to Node by id.

func (*NodeUpdate) SetValue 

func (nu *NodeUpdate) SetValue(i int) *NodeUpdate

SetValue sets the value field.

func (*NodeUpdate) Where 

func (nu *NodeUpdate) Where(ps ...predicate.Node) *NodeUpdate

Where adds a new predicate for the builder.

type NodeUpdateOne 

type NodeUpdateOne struct {
	// contains filtered or unexported fields
}

NodeUpdateOne is the builder for updating a single Node entity.

func (*NodeUpdateOne) AddValue 

func (nuo *NodeUpdateOne) AddValue(i int) *NodeUpdateOne

AddValue adds i to value.

func (*NodeUpdateOne) ClearNext 

func (nuo *NodeUpdateOne) ClearNext() *NodeUpdateOne

ClearNext clears the "next" edge to type Node.

func (*NodeUpdateOne) ClearPrev 

func (nuo *NodeUpdateOne) ClearPrev() *NodeUpdateOne

ClearPrev clears the "prev" edge to type Node.

func (*NodeUpdateOne) Exec 

func (nuo *NodeUpdateOne) Exec(ctx context.Context) error

Exec executes the query on the entity.

func (*NodeUpdateOne) ExecX 

func (nuo *NodeUpdateOne) ExecX(ctx context.Context)

ExecX is like Exec, but panics if an error occurs.

func (*NodeUpdateOne) Mutation 

func (nuo *NodeUpdateOne) Mutation() *NodeMutation

Mutation returns the NodeMutation object of the builder.

func (*NodeUpdateOne) Save 

func (nuo *NodeUpdateOne) Save(ctx context.Context) (*Node, error)

Save executes the query and returns the updated entity.

func (*NodeUpdateOne) SaveX 

func (nuo *NodeUpdateOne) SaveX(ctx context.Context) *Node

SaveX is like Save, but panics if an error occurs.

func (*NodeUpdateOne) SetNext 

func (nuo *NodeUpdateOne) SetNext(n *Node) *NodeUpdateOne

SetNext sets the next edge to Node.

func (*NodeUpdateOne) SetNextID 

func (nuo *NodeUpdateOne) SetNextID(id int) *NodeUpdateOne

SetNextID sets the next edge to Node by id.

func (*NodeUpdateOne) SetNillableNextID 

func (nuo *NodeUpdateOne) SetNillableNextID(id *int) *NodeUpdateOne

SetNillableNextID sets the next edge to Node by id if the given value is not nil.

func (*NodeUpdateOne) SetNillablePrevID 

func (nuo *NodeUpdateOne) SetNillablePrevID(id *int) *NodeUpdateOne

SetNillablePrevID sets the prev edge to Node by id if the given value is not nil.

func (*NodeUpdateOne) SetPrev 

func (nuo *NodeUpdateOne) SetPrev(n *Node) *NodeUpdateOne

SetPrev sets the prev edge to Node.

func (*NodeUpdateOne) SetPrevID 

func (nuo *NodeUpdateOne) SetPrevID(id int) *NodeUpdateOne

SetPrevID sets the prev edge to Node by id.

func (*NodeUpdateOne) SetValue 

func (nuo *NodeUpdateOne) SetValue(i int) *NodeUpdateOne

SetValue sets the value field.

type Nodes 

type Nodes []*Node

Nodes is a parsable slice of Node.

type NotFoundError 

type NotFoundError struct {
	// contains filtered or unexported fields
}

NotFoundError returns when trying to fetch a specific entity and it was not found in the database.

func (*NotFoundError) Error 

func (e *NotFoundError) Error() string

Error implements the error interface.

type NotLoadedError 

type NotLoadedError struct {
	// contains filtered or unexported fields
}

NotLoadedError returns when trying to get a node that was not loaded by the query.

func (*NotLoadedError) Error 

func (e *NotLoadedError) Error() string

Error implements the error interface.

type NotSingularError 

type NotSingularError struct {
	// contains filtered or unexported fields
}

NotSingularError returns when trying to fetch a singular entity and more then one was found in the database.

func (*NotSingularError) Error 

func (e *NotSingularError) Error() string

Error implements the error interface.

type Op 

type Op = ent.Op

ent aliases to avoid import conflict in user's code.

type Option 

type Option func(*config)

Option function to configure the client.

func Debug 

func Debug() Option

Debug enables debug logging on the ent.Driver.

func Driver 

func Driver(driver dialect.Driver) Option

Driver configures the client driver.

func Log 

func Log(fn func(...interface{})) Option

Log sets the logging function for debug mode.

type OrderFunc 

type OrderFunc func(*sql.Selector, func(string) bool)

OrderFunc applies an ordering on the sql selector.

func Asc 

func Asc(fields ...string) OrderFunc

Asc applies the given fields in ASC order.

func Desc 

func Desc(fields ...string) OrderFunc

Desc applies the given fields in DESC order.

type Policy 

type Policy = ent.Policy

ent aliases to avoid import conflict in user's code.

type Query 

type Query = ent.Query

ent aliases to avoid import conflict in user's code.

type RollbackFunc 

type RollbackFunc func(context.Context, *Tx) error

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

func (RollbackFunc) Rollback 

func (f RollbackFunc) Rollback(ctx context.Context, tx *Tx) error

Rollback calls f(ctx, m).

type RollbackHook 

type RollbackHook func(Rollbacker) Rollbacker

RollbackHook defines the "rollback middleware". A function that gets a Rollbacker and returns a Rollbacker. For example: 

hook := func(next ent.Rollbacker) ent.Rollbacker {
	return ent.RollbackFunc(func(context.Context, tx *ent.Tx) error {
		// Do some stuff before.
		if err := next.Rollback(ctx, tx); err != nil {
			return err
		}
		// Do some stuff after.
		return nil
	})
}

type Rollbacker 

type Rollbacker interface {
	Rollback(context.Context, *Tx) error
}

Rollbacker is the interface that wraps the Rollbacker method.

type Tx 

type Tx struct {

	// Node is the client for interacting with the Node builders.
	Node *NodeClient
	// contains filtered or unexported fields
}

Tx is a transactional client that is created by calling Client.Tx().

func TxFromContext 

func TxFromContext(ctx context.Context) *Tx

TxFromContext returns the Tx stored in a context, or nil if there isn't one.

func (*Tx) Client 

func (tx *Tx) Client() *Client

Client returns a Client that binds to current transaction.

func (*Tx) Commit 

func (tx *Tx) Commit() error

Commit commits the transaction.

func (*Tx) OnCommit 

func (tx *Tx) OnCommit(f CommitHook)

OnCommit adds a hook to call on commit.

func (*Tx) OnRollback 

func (tx *Tx) OnRollback(f RollbackHook)

OnRollback adds a hook to call on rollback.

func (*Tx) Rollback 

func (tx *Tx) Rollback() error

Rollback rollbacks the transaction.

type ValidationError 

type ValidationError struct {
	Name string // Field or edge name.
	// contains filtered or unexported fields
}

ValidationError returns when validating a field fails.

func (*ValidationError) Error 

func (e *ValidationError) Error() string

Error implements the error interface.

func (*ValidationError) Unwrap 

func (e *ValidationError) Unwrap() error

Unwrap implements the errors.Wrapper interface.

type Value 

type Value = ent.Value

ent aliases to avoid import conflict in user's code.

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