model

问题 I am pretty new in Spring MVC. In this period I am studying the Spring MVC showcase example downlodable from STS dashboard. I am having some problems understanding how Custom Resolvable Web Arguments are handled in this example. In practice I have the following situation: In my home.jsp view I have the following link: <a id="customArg" class="textLink" href="<c:url value="/data/custom" />">Custom</a> This link generate an HTTP Request towards the URL: "/data/custom" The controller class that

问题 I am pretty new in Spring MVC. In this period I am studying the Spring MVC showcase example downlodable from STS dashboard. I am having some problems understanding how Custom Resolvable Web Arguments are handled in this example. In practice I have the following situation: In my home.jsp view I have the following link: <a id="customArg" class="textLink" href="<c:url value="/data/custom" />">Custom</a> This link generate an HTTP Request towards the URL: "/data/custom" The controller class that

问题 I've never done such thing so i'm not sure what would be the best approach for solving this problem: I have two Django projects: root/ project1/ manage.py project1/ models.py urls.py ... project2/ manage.py project2/ models.py urls.py ... Those projects use same database, they have around 10 models (database tables) each and some of the models overlap: Project1 needs ForeignKey from one fo the Project2's models, but also Project2 needs ForeignKey from one of the Project1's models: Project1:

问题 I am just starting with Django and want to create a model for an application. I find Djangos feature to - automatically define validations and html widget types for forms according to the field type defined in the model and - define a choice set for the field right in the model very usefull and I want to make best use of it. Also, I want to make best use of the admin interface. However, what if I want to allow the user of the application to add fields to the model? For example, consider a

问题 Following WPF MvvmFoundation , linking the View with the ViewModel has many choices like described on http://www.paulstovell.com/mvvm-instantiation-approaches. However their example has nothing about how to link the ViewModel with the Model . Traditionally I created the model first and then one or more views that render it. It seems that MVVM pushes people to create the View, which creates the ViewModel, which create the Model. I hope it's not the case as wiring a complex business model with

问题 im new to django an programming with pyton and right now i am trying to bind checkboxes to a ID (not the primary Key. Right now i can write the value of the checkboxes to the database, but everytime i do that django makes an insert but i need to do an update to the database. I get the right id true the url. If i use instance= suddenly no checkbox is stored at all but the id is erased from the database. How can i bind the checkboxes to the posid in my database. So my database would be like id

问题 I have model like below: class ProfileModel : NSObject, NSCoding{ var userId : String! var userAddresses : [ProfileModelUserAddress]! init(fromDictionary dictionary: [String:Any]){ userId = dictionary["userId"] as? String userAddresses = [ProfileModelUserAddress]() if let userAddressesArray = dictionary["userAddresses"] as? [[String:Any]]{ for dic in userAddressesArray{ let value = ProfileModelUserAddress(fromDictionary: dic) userAddresses.append(value) } }} func toDictionary() -> [String:Any

问题 I rendered a scene having earth and a satellite. The position of the satellite is collected and updated by a thread. The position data is provided by an background calculation program. // main.cpp void CollectCraft(void) { SetupChannel(); int iFlag = 1; while(iFlag > 0) { iFlag = CollectData(); Sleep(10); } CloseChannel(); } int main(void) { CreateThread(NULL, NULL, (LPTHREAD_START_ROUTINE)CollectCraft, 0, NULL, NULL); // in collect.cpp RenderMainWindow(); // in render.cpp return 1; } The

问题 I'm using L5.3.31 and have the following models: Addon Image Relationship: // Addon.php public function images() { return $this->hasMany('App\Image'); } // Image.php public function addon() { return $this->belongsTo('App\Addon'); } I now want to extend the delete() method to delete some images that are saved on the file system when deleting an image object. To my understand, in order to do this I need to extend the delete() method on the Image model. Now, on my image model, if I try to do

问题 I'm using L5.3.31 and have the following models: Addon Image Relationship: // Addon.php public function images() { return $this->hasMany('App\Image'); } // Image.php public function addon() { return $this->belongsTo('App\Addon'); } I now want to extend the delete() method to delete some images that are saved on the file system when deleting an image object. To my understand, in order to do this I need to extend the delete() method on the Image model. Now, on my image model, if I try to do