mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-12-28 18:16:31 +00:00
42 lines
930 B
Go
42 lines
930 B
Go
package schema
|
|
|
|
import (
|
|
"fmt"
|
|
)
|
|
|
|
const (
|
|
InvalidRelation = iota
|
|
HasOneRelation
|
|
BelongsToRelation
|
|
HasManyRelation
|
|
ManyToManyRelation
|
|
)
|
|
|
|
type Relation struct {
|
|
Type int
|
|
Field *Field
|
|
JoinTable *Table
|
|
BaseFields []*Field
|
|
JoinFields []*Field
|
|
OnUpdate string
|
|
OnDelete string
|
|
Condition []string
|
|
|
|
PolymorphicField *Field
|
|
PolymorphicValue string
|
|
|
|
M2MTable *Table
|
|
M2MBaseFields []*Field
|
|
M2MJoinFields []*Field
|
|
}
|
|
|
|
// References returns true if the table to which the Relation belongs needs to declare a foreign key constraint to create the relation.
|
|
// For other relations, the constraint is created in either the referencing table (1:N, 'has-many' relations) or a mapping table (N:N, 'm2m' relations).
|
|
func (r *Relation) References() bool {
|
|
return r.Type == HasOneRelation || r.Type == BelongsToRelation
|
|
}
|
|
|
|
func (r *Relation) String() string {
|
|
return fmt.Sprintf("relation=%s", r.Field.GoName)
|
|
}
|