user table and role table have many-to-many relationship, and the middle table is user_roles. many-to-many relationships are defined in the user model class public function relRole(){ return $this->belongsToMany( App Model Role , ...
I just started to learn the association model of laravel, and I was so confused that sometimes I really felt that it was not as convenient as writing sql directly. now there is a problem role tables admin_roles and admin_permissions tables have a man...
when using larave s gate for permission verification Admin_users (user table) Admin_roles (role table) Admin_permissions (permissions table) are many-to-many relationships first, register gate in App providers AuthServiceProvider $permissions=Admin...
version: laravel 5.7 when using the $appends attribute of the model modifier to add elements and using faker to generate false data, an error is reported: Unknown column sex_str Model related code: $factory->define( App Models User::cl...
class products (models.Model): MODE_CHOICES=(( week , ),( day , )) productname=models.CharField(max_length=30,unique=True) dutymode=models.CharField(max_length=30,choices=MODE_CHOICES,default= week ) class dutygroups (models.Model): pro...
what is the meaning of the "training algorithm " in the figure below? For example, the KNN algorithm mentioned below is not a function, something determined by routines? Why train? ...
I can t find select at all. he asked me to add border-radius: 5px , but I don t have this Spanish in all the files. Where on earth did this come from? ...
the first paragraph is that I want to decide whether $_ GET [ status ] is empty. Yes, please indicate $_GET[ status ]!= ? x : ; but in x I want to add another criterion $_GET[ status ]==1 ? : ; that is, when you make sure that the...
because I m going to upgrade the latest version of angular cli (angular6, I m going to uninstall angular cli, but no matter how I execute the command, I can t even delete the global package . I went to angular cli s GitHub and tried a lot of method...
doesn t understand how helper functions get multiple states in a document. Can you give a detailed and simple description of the mapState helper function when a component needs to obtain multiple states, declaring these states as computational proper...
...