types

README

types

The types package provides some useful types which implement the sql.Scanner and driver.Valuer interfaces, suitable for use as scan and value targets with database/sql.

Documentation

Index

• type BitBool
  • func (b *BitBool) Scan(src interface{}) error
  • func (b BitBool) Value() (driver.Value, error)
• type GzippedText
  • func (g *GzippedText) Scan(src interface{}) error
  • func (g GzippedText) Value() (driver.Value, error)
• type JSONText
  • func (j JSONText) MarshalJSON() ([]byte, error)
  • func (j *JSONText) Scan(src interface{}) error
  • func (j JSONText) String() string
  • func (j *JSONText) Unmarshal(v interface{}) error
  • func (j *JSONText) UnmarshalJSON(data []byte) error
  • func (j JSONText) Value() (driver.Value, error)
• type NullJSONText
  • func (n *NullJSONText) Scan(value interface{}) error
  • func (n NullJSONText) Value() (driver.Value, error)

Types

type BitBool

type BitBool bool

BitBool is an implementation of a bool for the MySQL type BIT(1). This type allows you to avoid wasting an entire byte for MySQL's boolean type TINYINT.

func (*BitBool) Scan

func (b *BitBool) Scan(src interface{}) error

Scan implements the sql.Scanner interface, and turns the bitfield incoming from MySQL into a BitBool

func (BitBool) Value

func (b BitBool) Value() (driver.Value, error)

Value implements the driver.Valuer interface, and turns the BitBool into a bitfield (BIT(1)) for MySQL storage.

type GzippedText

type GzippedText []byte

GzippedText 是一个[]字节，透明地gzip压缩要提交到数据库的数据，ungzip数据要从数据库扫描的数据。

func (*GzippedText) Scan

func (g *GzippedText) Scan(src interface{}) error

Scan implements the sql.Scanner interface, ungzipping the value coming off the wire and storing the raw result in the GzippedText.

func (GzippedText) Value

func (g GzippedText) Value() (driver.Value, error)

Value 实现<driver.Valuer>接口，将此<GzippedText>的原始值压缩为gzip。

type JSONText

type JSONText json.RawMessage

JSONText is a json.RawMessage, which is a []byte underneath. Value() validates the json format in the source, and returns an error if the json is not valid. Scan does no validation. JSONText additionally implements `Unmarshal`, which unmarshals the json within to an interface{}

func (JSONText) MarshalJSON

func (j JSONText) MarshalJSON() ([]byte, error)

MarshalJSON returns the *j as the JSON encoding of j.

func (*JSONText) Scan

func (j *JSONText) Scan(src interface{}) error

Scan stores the src in *j. No validation is done.

func (JSONText) String

func (j JSONText) String() string

String supports pretty printing for JSONText types.

func (*JSONText) Unmarshal

func (j *JSONText) Unmarshal(v interface{}) error

Unmarshal unmarshal's the json in j to v, as in json.Unmarshal.

func (*JSONText) UnmarshalJSON

func (j *JSONText) UnmarshalJSON(data []byte) error

UnmarshalJSON sets *j to a copy of data

func (JSONText) Value

func (j JSONText) Value() (driver.Value, error)

Value returns j as a value. This does a validating unmarshal into another RawMessage. If j is invalid json, it returns an error.

type NullJSONText

type NullJSONText struct {
	JSONText
	Valid bool // Valid is true if JSONText is not NULL
}

NullJSONText represents a JSONText that may be null. NullJSONText implements the scanner interface so it can be used as a scan destination, similar to NullString.

func (*NullJSONText) Scan

func (n *NullJSONText) Scan(value interface{}) error

Scan implements the Scanner interface.

func (NullJSONText) Value

func (n NullJSONText) Value() (driver.Value, error)

Value implements the driver Valuer interface.