models

问题 This is my first time using a polymorphic relationship. I am creating a LMS where a Assignment can be allocated to a individual user or a team so reading the Laravel docs it seems that the Polymorphic Relationship will be a good way to go about it. I have created 4 tables. Users: | id | username | password | created_at | updated_at | Teams: | id | friendly_name | slug | Team User: | id | user_id | team_id | Assignment Allocation: | id | assignment_id | assignmentable_type | assignmentable_id

问题 I have x-y scatter data, which exhibit bell-shaped (i.e. normal distribution shaped) behaviour over the course of a year. These are primary production data from high latitudes (more in detail here, the article is paywalled, but I hope that the figures are visible). Question How do I fit a normal distribution shaped curve on scatter data in ggplot2? Example data x <- structure(list(yday = c(238, 238, 238, 242, 242, 250, 250, 253, 254, 169, 199, 208, 230, 21, 37, 88, 94, 102, 125, 125, 95, 98,

问题 I'm getting class model not found error In my model class namespace App\models; use Illuminate\Database\Eloquent\Model; class Customer extends Model { protected $table = 'customers'; } And in my controller namespace App\Http\Controllers; use Illuminate\Http\Request; use \app\Models\Customer; use Illuminate\Support\Facades\Input; class RoomsController extends Controller { public function index() { $room= Customer::all(); return view('rooms',compact('room')); } } I even tried composer dump

问题 I have a GooglePlace model with a field to store the address_components being returned by Google Places API. model.py address_components = ArrayField(JSONField(), null=True, blank=True) I am trying to store the data like this address_components = [component for component in google_place_details.get("address_components")] But I am getting this error : column "address_components" is of type jsonb[] but expression is of type text[] LINE 1: ... '2018-04-26T07:49:02.101395+00:00'::timestamptz,

来源： https://stackoverflow.com/questions/41720532/how-to-put-data-from-manytomanyfield-to-choices-in-multiplechoicefield

来源： https://stackoverflow.com/questions/11764709/can-you-add-parameters-to-django-custom-admin-actions

来源： https://stackoverflow.com/questions/11764709/can-you-add-parameters-to-django-custom-admin-actions

来源： https://stackoverflow.com/questions/15436235/importing-models-in-django-python

来源： https://stackoverflow.com/questions/15436235/importing-models-in-django-python

来源： https://stackoverflow.com/questions/42089357/calculate-the-sum-of-model-properties-in-django