Model associate(

Builder getRelationQuery(

Collection newCollection(array $models = array())

string getPlainMorphType() Get the plain morph type name without the table

string getRelationCountHash() Get a relationship join table hash.

Pivot newExistingPivot(array $attributes

Builder getBaseQuery()

string getQualifiedOtherKeyName() Get the fully qualified associated key

string getHasCompareKey() Get the key for comparing against the parent

abstract void addConstraints() Set the base constraints