filter

Documentation

Overview

Package filter provides methods to build logical filters. Filters are used to read or update only documents, which satisfies the filter.

Index

• Variables
• type Expr
  • func And(ops ...Expr) Expr
  • func Eq[T schema.PrimitiveFieldType](field string, value T) Expr
  • func EqBytes(field string, value []byte) Expr
  • func EqFloat32(field string, value float32) Expr
  • func EqFloat64(field string, value float64) Expr
  • func EqInt(field string, value int) Expr
  • func EqInt32(field string, value int32) Expr
  • func EqInt64(field string, value int64) Expr
  • func EqString(field string, value string) Expr
  • func EqTime(field string, value time.Time) Expr
  • func EqUUID(field string, value uuid.UUID) Expr
  • func Gt(field string, value interface{}) Expr
  • func Gte(field string, value interface{}) Expr
  • func Lt(field string, value interface{}) Expr
  • func Lte(field string, value interface{}) Expr
  • func Or(ops ...Expr) Expr
  • func (prev Expr) Build() (driver.Filter, error)
• type Filter
• type Operand

Variables

var (
	//All represents filter which includes all the documents of the collection
	All = Expr{}
)

Types

type Expr

type Expr map[string]interface{}

func And

func And(ops ...Expr) Expr

And composes 'and' operation. Result is equivalent to: (ops[0] && ... && ops[len(ops-1])

func Eq

func Eq[T schema.PrimitiveFieldType](field string, value T) Expr

Eq composes 'equal' operation. Result is equivalent to: field == value

func EqBytes

func EqBytes(field string, value []byte) Expr

EqBytes composes 'equal' operation from []byte value. Result is equivalent to: field == value

func EqFloat32

func EqFloat32(field string, value float32) Expr

EqFloat32 composes 'equal' operation from float32 value. Result is equivalent to: field == value

func EqFloat64

func EqFloat64(field string, value float64) Expr

EqFloat64 composes 'equal' operation from float64 value. Result is equivalent to: field == value

func EqInt

func EqInt(field string, value int) Expr

EqInt composes 'equal' operation from int value. Result is equivalent to: field == value

func EqInt32

func EqInt32(field string, value int32) Expr

EqInt32 composes 'equal' operation from int32 value. Result is equivalent to: field == value

func EqInt64

func EqInt64(field string, value int64) Expr

EqInt64 composes 'equal' operation from int64 value. Result is equivalent to: field == value

func EqString

func EqString(field string, value string) Expr

EqString composes 'equal' operation from string value. Result is equivalent to: field == value

func EqTime

func EqTime(field string, value time.Time) Expr

EqTime composes 'equal' operation. from time.Time value. Result is equivalent to: field == value

func EqUUID

func EqUUID(field string, value uuid.UUID) Expr

EqUUID composes 'equal' operation. from uuid.UUID value. Result is equivalent to: field == value

func Gt

func Gt(field string, value interface{}) Expr

Gt composes 'greater than' operation. Result is equivalent to: field > value

func Gte

func Gte(field string, value interface{}) Expr

Gte composes 'greater than or equal' operation. Result is equivalent to: field >= value

func Lt

func Lt(field string, value interface{}) Expr

Lt composes 'less than' operation. Result is equivalent to: field < value

func Lte

func Lte(field string, value interface{}) Expr

Lte composes 'less than or equal' operation. Result is equivalent to: field <= value

func Or

func Or(ops ...Expr) Expr

Or composes 'or' operation. Result is equivalent to: (ops[0] || ... || ops[len(ops-1])

func (Expr) Build

func (prev Expr) Build() (driver.Filter, error)

Build materializes the filter

type Filter

type Filter = Expr

type Operand

type Operand map[string]comparison