public string | array getFields () Returns the fields
integer HAS_ONE_THROUGH
public setIntermediateRelation (string | array $intermediateFields, string $intermediateModel, string $intermediateReferencedFields)
public getType () Returns the relation type
integer BELONGS_TO
public getReferencedModel () Returns the referenced model
integer ACTION_CASCADE
public string | array getOptions () Returns the options
integer HAS_MANY_THROUGH
integer HAS_ONE
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