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 js novice, recently encountered a little question when learning the content of the object, as follows: personal understanding: every time an instance object is generated using the new command, all the properties in the constructor will be define...
doesn t the h5 LVB format under ios only use hls? Why doesn t it look like a big delay compared to PC-side web? Is the reason for server-side optimization? Can the delay of Qiniuyun reach this level? ...
Wechat cookie and localstorage fail this is the case: Wechat opens page a, and when page an enters, it determines whether userid exists. If not, use cookie or localstorage to store a random userid with a hyperlink in page a, like this . this code ...
I hope that only 172.29.8.72 and 192.168.3.39 can be connected to a user in mysql. How should I set it? ...
write a simple demo, using cepython with the following code: from cefpython3 import cefpython as cef def main(): settings = { "single_process": False } sys.excepthook = cef.ExceptHook cef.Initialize(settings=settings)...