model

问题 Hi i'm looking for a asp.net mvc callback for elaborate data before save a model. In rails there is before_save. Thanks 回答1: If you are using Entity Framework (which your tag indicates), then this StackOverflow post should be able to help you out. Basically you can intercept the SavingChanges event, and do whatever you want. Put this in a partial class that adds the following methods to your object context: partial void OnContextCreated() { SavingChanges += DoWhatYouMust; } private void

问题 I am using code igniter and I am building a query to return how many people attended an event. So I can take the number and try to work out a percentage. The issue I am having is I am trying to build the query according to Codeigniter 3 Docs, But I am returning the wrong result for some reason and simply cannot figure out why. First of all here is the table in my database I am querying: Here is the function I am calling from my controller: public function get_event_attendance_percentage($id)

问题 I am using code igniter and I am building a query to return how many people attended an event. So I can take the number and try to work out a percentage. The issue I am having is I am trying to build the query according to Codeigniter 3 Docs, But I am returning the wrong result for some reason and simply cannot figure out why. First of all here is the table in my database I am querying: Here is the function I am calling from my controller: public function get_event_attendance_percentage($id)

问题 I have this setup:- \App\Policies\ObservationPolicy <?php namespace App\Policies; use App\Observation; use App\User; use Illuminate\Auth\Access\HandlesAuthorization; class ObservationPolicy { use HandlesAuthorization; /** * Create a new policy instance. * * @return void */ public function __construct() { // } public function edit(User $user, Observation $observation) { return $user->id == $observation->user_id; } } Auth Service provider : <?php namespace App\Providers; use Illuminate\Support

问题 I want to access all the data of a model in one of its views, which I made and called searching.php . I wrote an action in the business controller which is like this: public function actionSearching() { // using the default layout 'protected/views/layouts/main.php' $this->layout='//layouts/main'; $this->render('searching'); } In the view of business/searching I want to access all the data of a model (Business). This includes business_name, business_description etc. But when I run this code I

问题 How do I duplicate an existing model record? Put another way, how do I retrieve an existing model with related data, then save a COPY of that model AND data (both model and related data are copied)? This is trivial using simple SQL, but I want to do it using CakePHP best practices. 回答1: $record = $this->Model->find('first', array('condition' => array('Model.id' => $id))); unset($record['Model']['id'], $record['RelatedModel']['id'], /* further ids */); $this->Model->create(); $this->Model-

问题 I have for example the Post with the id 31 after I upload one or more images are displayed in db as: id (for example: 1,2,3) url to image(for example: my-images/image.png) foreing_id (thats is id to post i.e 31 ) But I do not know how to display the image in the template for this post (and others of course) my model: class Post(models.Model): title = models.CharField(max_length=20000) date = models.DateTimeField(editable=True, null=True) text = models.TextField(max_length=50000) is_super =

问题 I'm curious in using the MVP Pattern to improve testability. I have experience with MVC but MVP seems different. I'm having an application that operates on a 'project' file which is in fact an compressed archive of several files and folders. This project should be my model. Where will I put the code that loads the model? I'm also thinking about another abstraction layer: Some kind of BackEndConnection. It will be able to read a project file. It can be an FileBackEndConnection or an

问题 I have a simple Play applicaiton for test. I have 2 controllers, one is a "ListController" that displays a list of entries. Each entry has an "edit" link which goes to the "EditController". The "EditController" diplays the html form with the existing data for the entry, and the submit button posts that data towards another method in the "EditController", which saves the data to db and redisplays the newly modify data in the form. All this works ok. However once I modify an entry (which is

问题 Since I got into learning about MVC I have always validated my form data in my controllers which is a habit I picked up while skimming through CodeIgniters code but I have learned that its way of doing certain operations is not the best, it just gets the job done. Should all form data be validated by the domain objects? And if so should it be done in the setters like so public function setFirstName($firstName) { // Check if the field was required if(!$firstName) { throw new