model

问题 That's my basic ( Database First ) diagram on SQL Server : When I Update Model from Database using Entity Framework (6.x) within my MVC application, I expect Users got this property: public virtual ICollection<Role> Roles { get; set; } As well Roles with: public virtual ICollection<User> Users { get; set; } But instead I got: public virtual ICollection<UsersRoles> UsersRoles { get; set; } public virtual ICollection<UsersRoles> UsersRoles { get; set; } Where am I wrong? 回答1: Your design is

问题 What is the best way to handle default page not found error when a user requests a url that doesn't have any mapping in the application (e.g. a url like /aaa/bbb that there is no mapping for it in the application) while be able to add model attributes to the page? 回答1: There is some anserws in SO but those have caused me other problems and more importantly they don't state how to add model attributes to the error page. The best solution I have found is this: Create a controller that

问题 What is the best way to handle default page not found error when a user requests a url that doesn't have any mapping in the application (e.g. a url like /aaa/bbb that there is no mapping for it in the application) while be able to add model attributes to the page? 回答1: There is some anserws in SO but those have caused me other problems and more importantly they don't state how to add model attributes to the error page. The best solution I have found is this: Create a controller that

问题 I have a model mutator on my pivot table like so: When I save to it like this: $account_transaction->subcategories()->attach($water_subcategory->id, ['amount'=>56]); The database shows 56, instead of 5600. <?php namespace App\Models; use Illuminate\Database\Eloquent\Model; class SubcategoryTransaction extends Model { protected $table = 'subcategory_transaction'; protected $fillable = ['amount']; public function getAmountAttribute($value) { if ($value) { $value = $value / 100; return $value; }

问题 I try to update an existing user: Controller-Snippet def account_settings @user = current_user end def set_account_info old_user = current_user # verify the current password by creating a new user record. @user = User.authenticate_by_username(old_user.username, params[:user][:password]) # verify if @user.nil? @user = current_user @user.errors[:password] = "Das eingegebene Passwort ist falsch." render :action => "account_settings" else # update the user with any new username and email @user

问题 I am creating a recurring event app where certain users (streamers) can schedule recurring weekly events (streams) and other users (viewers) can follow them. The result is a personalized weekly calendar detailing when all followed streamers' events begin and end. However, because viewers can follow an infinite number of streamers and therefore the resulting calendar would look like a hot mess. So I added a boolean attribute to the relationships table that indicates whether the relationship

问题 So I've been told that my data model for separating my cells into sections is bad. I have 3 separate collections in my Tableview cartItems, groupedItems, and brandTitle in the CartVC. and I've been told this: "You need to start over with a single collection representing nothing but sections data (where each piece of section data will hold the corresponding row data), so you can mutate the model without going insane" and "...recommended to avoid multiple Arrays for the datasource of a table

问题 I am converting my way of thinking and programming from Webforms to MVC3. For the record, it hurts my head. So I am making a calendar that has a month view (page only shows the days and events for that month). I'm putting two buttons Previous and Next to go from month to month. In Webforms, any change would just happen on Calendar.aspx. However, it seems that I'll have to make two ActionResults (both HttpPost). One goes to a Previous view and another to a Next view. Just to get the same

问题 I have a model called User which has_one Player . A Player belongs_to a User . I want to find all the Players which Users attributes City has a particular value. Right now I have this in my Player model: def find User.find(:all, :conditions => ['city LIKE ?', "%#{city}%"]) end However that gives me the User. I want the Players which Users satisfy that condition. How do I do that? 回答1: Try this. Player.joins(:user).where('user.city LIKE ?', "%#{city}%") 来源： https://stackoverflow.com/questions

问题 I have this model: class DocVersion(Commentable): name = models.CharField( 'Version', max_length=100, ) docfile = models.FileField( 'File', upload_to='content/%Y/%m/%d/%H/%M/%S', ) created = models.DateTimeField( 'Created', auto_now_add=True, ) creater = models.ForeignKey( User, ) class Document(DocumentBase): #..... blah ..... versions = models.ManyToManyField( DocVersion, ) In a function in a view, I have this function to do a deep copy of the DocVersion like so: def cp_document(transfer