orm

package
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Published: May 5, 2016 License: BSD-3-Clause Imports: 13 Imported by: 0

Documentation

Index

Constants

View Source
const (
	PrimaryKeyFlag = 1 << iota
	ForeignKeyFlag = 1 << iota
	NullFlag       = 1 << iota
)

Variables

View Source
var Tables = newTables()

Functions

func Create

func Create(db dber, v interface{}) error

func Delete

func Delete(db dber, v interface{}) error

func F

func F(field string, params ...interface{}) types.F

func Q

func Q(query string, params ...interface{}) types.Q

func Scan

func Scan(values ...interface{}) valuesModel

func Select

func Select(db dber, model interface{}) error

func Underscore

func Underscore(s string) string

Underscore converts "CamelCasedString" to "camel_cased_string".

func Update

func Update(db dber, v interface{}) error

Types

type Collection

type Collection interface {
	// NewModel returns ColumnScanner that is used to scan columns
	// from the current row.
	NewModel() ColumnScanner

	// AddModel adds ColumnScanner to the Collection.
	AddModel(ColumnScanner) error
}

Collection is a set of models mapped to database rows.

type ColumnScanner

type ColumnScanner interface {
	// Scan assigns a column value from a row.
	//
	// An error should be returned if the value can not be stored
	// without loss of information.
	ScanColumn(colIdx int, colName string, b []byte) error
}

ColumnScanner is an interface used to scan column.

type Discard

type Discard struct{}

func (Discard) AddModel

func (Discard) AddModel(_ ColumnScanner) error

func (Discard) NewModel

func (d Discard) NewModel() ColumnScanner

func (Discard) ScanColumn

func (Discard) ScanColumn(colIdx int, colName string, b []byte) error

type Field

type Field struct {
	GoName  string  // struct field name, e.g. Id
	SQLName string  // SQL name, .e.g. id
	ColName types.Q // escaped column name, e.g. "id"
	Index   []int
	// contains filtered or unexported fields
}

func (*Field) AppendValue

func (f *Field) AppendValue(b []byte, strct reflect.Value, quote int) []byte

func (*Field) Copy

func (f *Field) Copy() *Field

func (*Field) Has

func (f *Field) Has(flag int8) bool

func (*Field) IsEmpty

func (f *Field) IsEmpty(strct reflect.Value) bool

func (*Field) OmitEmpty

func (f *Field) OmitEmpty(strct reflect.Value) bool

func (*Field) ScanValue

func (f *Field) ScanValue(strct reflect.Value, b []byte) error

func (*Field) Value

func (f *Field) Value(strct reflect.Value) reflect.Value

type Formatter

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

func (Formatter) Append

func (f Formatter) Append(dst []byte, src string, params ...interface{}) []byte

func (Formatter) AppendBytes

func (f Formatter) AppendBytes(dst, src []byte, params ...interface{}) []byte

func (*Formatter) SetParam

func (f *Formatter) SetParam(key string, value interface{})

type Method

type Method struct {
	Index int
	// contains filtered or unexported fields
}

func (*Method) AppendValue

func (m *Method) AppendValue(dst []byte, strct reflect.Value, quote int) []byte

func (*Method) Has

func (m *Method) Has(flag int8) bool

func (*Method) Value

func (m *Method) Value(strct reflect.Value) reflect.Value

type Model

type Model interface {
	Collection
	ColumnScanner
}

func NewModel

func NewModel(values ...interface{}) (Model, error)

type Query

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

func NewQuery

func NewQuery(db dber, v interface{}) *Query

func (*Query) Column

func (q *Query) Column(columns ...string) *Query

func (*Query) ColumnExpr

func (q *Query) ColumnExpr(expr string, params ...interface{}) *Query

func (*Query) Count

func (q *Query) Count() (int, error)

Count returns number of rows matching the query using count aggregate function.

func (*Query) CountEstimate

func (q *Query) CountEstimate(threshold int) (int, error)

CountEstimate uses EXPLAIN to get estimated number of rows matching the query. If that number is bigger than the threshold it returns the estimation. Otherwise it executes another query using count aggregate function and returns the result.

Based on https://wiki.postgresql.org/wiki/Count_estimate

func (*Query) Create

func (q *Query) Create(values ...interface{}) (*types.Result, error)

Create inserts the model.

func (*Query) Delete

func (q *Query) Delete() (*types.Result, error)

Delete deletes the model.

func (*Query) First

func (q *Query) First() error

First selects the first row.

func (*Query) Group

func (q *Query) Group(group string, params ...interface{}) *Query

func (*Query) Join

func (q *Query) Join(join string, params ...interface{}) *Query

func (*Query) Last

func (q *Query) Last() error

Last selects the last row.

func (*Query) Limit

func (q *Query) Limit(n int) *Query

func (*Query) Offset

func (q *Query) Offset(n int) *Query

func (*Query) OnConflict

func (q *Query) OnConflict(s string, params ...interface{}) *Query

func (*Query) Order

func (q *Query) Order(order string, params ...interface{}) *Query

func (*Query) Returning

func (q *Query) Returning(columns ...interface{}) *Query

func (*Query) Select

func (q *Query) Select(values ...interface{}) error

Select selects the model.

func (*Query) SelectAndCount

func (q *Query) SelectAndCount(values ...interface{}) (count int, err error)

SelectAndCount runs Select and Count in two separate goroutines, waits for them to finish and returns the result.

func (*Query) SelectAndCountEstimate

func (q *Query) SelectAndCountEstimate(threshold int) (count int, err error)

SelectAndCountEstimate runs Select and CountEstimate in two separate goroutines, waits for them to finish and returns the result.

func (*Query) SelectOrCreate

func (q *Query) SelectOrCreate(values ...interface{}) (created bool, err error)

SelectOrCreate selects the model creating one if it does not exist.

func (*Query) Set

func (q *Query) Set(set string, params ...interface{}) *Query

func (*Query) Table

func (q *Query) Table(names ...string) *Query

func (*Query) Update

func (q *Query) Update() (*types.Result, error)

Update updates the model.

func (*Query) Where

func (q *Query) Where(where string, params ...interface{}) *Query

type QueryAppender

type QueryAppender interface {
	AppendQuery([]byte, ...interface{}) ([]byte, error)
}

type Relation

type Relation struct {
	One         bool
	Polymorphic bool

	Field *Field
	Join  *Table
	FKs   []*Field

	M2MTableName types.Q
	BasePrefix   string
	JoinPrefix   string
}

type Table

type Table struct {
	Name      types.Q // escaped table name
	ModelName string
	Type      reflect.Type

	PKs       []*Field
	Fields    []*Field
	FieldsMap map[string]*Field

	Methods   map[string]*Method
	Relations map[string]*Relation
}

func (*Table) AddField

func (t *Table) AddField(field *Field)

func (*Table) GetField

func (t *Table) GetField(fieldName string) (*Field, error)

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