Laravel Eloquent relationships Shorthand table

Eloquent relationships Shorthand table there is a big pit in the Model association: When the Belongsto is reversed, the foreign key is automatically searched by the method name plus _id. In addition, the association is based on the model name plus _id as the foreign key.

Type	Define	Inverse	Remark
One to one	HasOne	Belongsto	Withdefault () Define default foreign key→based on the model name Inverse default foreign key→name of the relationship method and suffixing the method name with _id
One to many	Hasmany	Belongsto	Define default foreign key→based on the model name Inverse default foreign key→name of the relationship method and suffixing the method name with _id
Many to many	Belongstomany	Belongstomany	Requires Intermediate table. Withpivot (' Column1 ', ' column2 '); Withtimestamps (); As (' subscription ') →withtimestamps (); Wherepivot (' approved ', 1) Wherepivotin (' priority ', [1, 2]); using (' App\userrole ');
has many Through	Hasmanythrough		Hasmanythrough (' App\post ', ' app\user ');
Polymorphic	Morphmany	Morphto	Morphmany (' app\comment ', ' commentable ') $comment = App\comment::find (1); $commentable = $comment →commentable; ↑will return either a Post or Video instance, depending on which type of model owns the comment Morphmap
Many to many polymorphic	Morphtomany	Morphedbymany	Morphtomany (' App\tag ', ' taggable '); Morphedbymany (' App\post ', ' taggable ');