zero

package
Version: v3.4.0+incompatible Latest Latest
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Published: Aug 1, 2018 License: BSD-2-Clause Imports: 9 Imported by: 0

Documentation

Overview

Package zero contains SQL types that consider zero input and null input to be equivalent with convenient support for JSON and text marshaling. Types in this package will JSON marshal to their zero value, even if null. Use the null parent package if you don't want this.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type Bool

type Bool struct {
	sql.NullBool
}

Bool is a nullable bool. False input is considered null. JSON marshals to false if null. Considered null to SQL unmarshaled from a false value.

func BoolFrom

func BoolFrom(b bool) Bool

BoolFrom creates a new Bool that will be null if false.

func BoolFromPtr

func BoolFromPtr(b *bool) Bool

BoolFromPtr creates a new Bool that be null if b is nil.

func NewBool

func NewBool(b bool, valid bool) Bool

NewBool creates a new Bool

func (Bool) IsZero

func (b Bool) IsZero() bool

IsZero returns true for null or zero Bools, for future omitempty support (Go 1.4?)

func (Bool) MarshalJSON

func (b Bool) MarshalJSON() ([]byte, error)

MarshalJSON implements json.Marshaler. It will encode null if this Bool is null.

func (Bool) MarshalText

func (b Bool) MarshalText() ([]byte, error)

MarshalText implements encoding.TextMarshaler. It will encode a zero if this Bool is null.

func (Bool) Ptr

func (b Bool) Ptr() *bool

Ptr returns a poBooler to this Bool's value, or a nil poBooler if this Bool is null.

func (*Bool) SetValid

func (b *Bool) SetValid(v bool)

SetValid changes this Bool's value and also sets it to be non-null.

func (*Bool) UnmarshalJSON

func (b *Bool) UnmarshalJSON(data []byte) error

UnmarshalJSON implements json.Unmarshaler. "false" will be considered a null Bool. It also supports unmarshalling a sql.NullBool.

func (*Bool) UnmarshalText

func (b *Bool) UnmarshalText(text []byte) error

UnmarshalText implements encoding.TextUnmarshaler. It will unmarshal to a null Bool if the input is a false or not a bool. It will return an error if the input is not a float, blank, or "null".

type Float

type Float struct {
	sql.NullFloat64
}

Float is a nullable float64. Zero input will be considered null. JSON marshals to zero if null. Considered null to SQL if zero.

func FloatFrom

func FloatFrom(f float64) Float

FloatFrom creates a new Float that will be null if zero.

func FloatFromPtr

func FloatFromPtr(f *float64) Float

FloatFromPtr creates a new Float that be null if f is nil.

func NewFloat

func NewFloat(f float64, valid bool) Float

NewFloat creates a new Float

func (Float) IsZero

func (f Float) IsZero() bool

IsZero returns true for null or zero Floats, for future omitempty support (Go 1.4?)

func (Float) MarshalJSON

func (f Float) MarshalJSON() ([]byte, error)

MarshalJSON implements json.Marshaler. It will encode null if this Float is null.

func (Float) MarshalText

func (f Float) MarshalText() ([]byte, error)

MarshalText implements encoding.TextMarshaler. It will encode a zero if this Float is null.

func (Float) Ptr

func (f Float) Ptr() *float64

Ptr returns a poFloater to this Float's value, or a nil poFloater if this Float is null.

func (*Float) SetValid

func (f *Float) SetValid(v float64)

SetValid changes this Float's value and also sets it to be non-null.

func (*Float) UnmarshalJSON

func (f *Float) UnmarshalJSON(data []byte) error

UnmarshalJSON implements json.Unmarshaler. It supports number and null input. 0 will be considered a null Float. It also supports unmarshalling a sql.NullFloat64.

func (*Float) UnmarshalText

func (f *Float) UnmarshalText(text []byte) error

UnmarshalText implements encoding.TextUnmarshaler. It will unmarshal to a null Float if the input is a blank, zero, or not a float. It will return an error if the input is not a float, blank, or "null".

type Int

type Int struct {
	sql.NullInt64
}

Int is a nullable int64. JSON marshals to zero if null. Considered null to SQL if zero.

func IntFrom

func IntFrom(i int64) Int

IntFrom creates a new Int that will be null if zero.

func IntFromPtr

func IntFromPtr(i *int64) Int

IntFromPtr creates a new Int that be null if i is nil.

func NewInt

func NewInt(i int64, valid bool) Int

NewInt creates a new Int

func (Int) IsZero

func (i Int) IsZero() bool

IsZero returns true for null or zero Ints, for future omitempty support (Go 1.4?)

func (Int) MarshalJSON

func (i Int) MarshalJSON() ([]byte, error)

MarshalJSON implements json.Marshaler. It will encode 0 if this Int is null.

func (Int) MarshalText

func (i Int) MarshalText() ([]byte, error)

MarshalText implements encoding.TextMarshaler. It will encode a zero if this Int is null.

func (Int) Ptr

func (i Int) Ptr() *int64

Ptr returns a pointer to this Int's value, or a nil pointer if this Int is null.

func (*Int) SetValid

func (i *Int) SetValid(n int64)

SetValid changes this Int's value and also sets it to be non-null.

func (*Int) UnmarshalJSON

func (i *Int) UnmarshalJSON(data []byte) error

UnmarshalJSON implements json.Unmarshaler. It supports number and null input. 0 will be considered a null Int. It also supports unmarshalling a sql.NullInt64.

func (*Int) UnmarshalText

func (i *Int) UnmarshalText(text []byte) error

UnmarshalText implements encoding.TextUnmarshaler. It will unmarshal to a null Int if the input is a blank, zero, or not an integer. It will return an error if the input is not an integer, blank, or "null".

type String

type String struct {
	sql.NullString
}

String is a nullable string. JSON marshals to a blank string if null. Considered null to SQL if zero.

func NewString

func NewString(s string, valid bool) String

NewString creates a new String

func StringFrom

func StringFrom(s string) String

StringFrom creates a new String that will be null if s is blank.

func StringFromPtr

func StringFromPtr(s *string) String

StringFromPtr creates a new String that be null if s is nil or blank. It will make s point to the String's value.

func (String) IsZero

func (s String) IsZero() bool

IsZero returns true for null or empty strings, for potential future omitempty support.

func (String) MarshalText

func (s String) MarshalText() ([]byte, error)

MarshalText implements encoding.TextMarshaler. It will encode a blank string when this String is null.

func (String) Ptr

func (s String) Ptr() *string

Ptr returns a pointer to this String's value, or a nil pointer if this String is null.

func (*String) SetValid

func (s *String) SetValid(v string)

SetValid changes this String's value and also sets it to be non-null.

func (*String) UnmarshalJSON

func (s *String) UnmarshalJSON(data []byte) error

UnmarshalJSON implements json.Unmarshaler. It supports string and null input. Blank string input produces a null String. It also supports unmarshalling a sql.NullString.

func (*String) UnmarshalText

func (s *String) UnmarshalText(text []byte) error

UnmarshalText implements encoding.TextUnmarshaler. It will unmarshal to a null String if the input is a blank string.

type Time

type Time struct {
	Time  time.Time
	Valid bool
}

Time is a nullable time.Time. JSON marshals to the zero value for time.Time if null. Considered to be null to SQL if zero.

func NewTime

func NewTime(t time.Time, valid bool) Time

NewTime creates a new Time.

func TimeFrom

func TimeFrom(t time.Time) Time

TimeFrom creates a new Time that will be null if t is the zero value.

func TimeFromPtr

func TimeFromPtr(t *time.Time) Time

TimeFromPtr creates a new Time that will be null if t is nil or *t is the zero value.

func (Time) IsZero

func (t Time) IsZero() bool

IsZero returns true for null or zero Times, for potential future omitempty support.

func (Time) MarshalJSON

func (t Time) MarshalJSON() ([]byte, error)

MarshalJSON implements json.Marshaler. It will encode the zero value of time.Time if this time is invalid.

func (Time) MarshalText

func (t Time) MarshalText() ([]byte, error)

func (Time) Ptr

func (t Time) Ptr() *time.Time

Ptr returns a pointer to this Time's value, or a nil pointer if this Time is zero.

func (*Time) Scan

func (t *Time) Scan(value interface{}) error

Scan implements Scanner interface.

func (*Time) SetValid

func (t *Time) SetValid(v time.Time)

SetValid changes this Time's value and sets it to be non-null.

func (*Time) UnmarshalJSON

func (t *Time) UnmarshalJSON(data []byte) error

UnmarshalJSON implements json.Unmarshaler. It supports string, object (e.g. pq.NullTime and friends) and null input.

func (*Time) UnmarshalText

func (t *Time) UnmarshalText(text []byte) error

func (Time) Value

func (t Time) Value() (driver.Value, error)

Value implements the driver Valuer interface.

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