DeleteRule enum

A foreign key with delete rules

CASCADE: means that if a record in the parent table is deleted, then the corresponding records in the child table will automatically be deleted.

SET_DEFAULT_VALUE: means that if a record in the parent table is deleted, then the corresponding records will be set to the default value automatically without deleting.

SET_NULL: means that if a record in the parent table is deleted, then the corresponding records will be set NULL automatically without deleting.

NO_ACTION: means if there is a row in the CHILD table, you are not able to delete its PARENT row without breaking referential integrity, so the Delete will be rolled back (fail by NO ACTION)

Inheritance

• Object
• Enum
• DeleteRule

Constructors

DeleteRule()

const

Values

CASCADE → const DeleteRule

SET_DEFAULT_VALUE → const DeleteRule

SET_NULL → const DeleteRule

NO_ACTION → const DeleteRule

Properties

hashCode → int

The hash code for this object.

no setter, inherited

index → int

A numeric identifier for the enumerated value.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Constants

values → const List<DeleteRule>

A constant List of the values in this enum, in order of their declaration.