All Questions
825
questions
97
votes
6
answers
187k
views
Check if an object exists
I need to check if Model.objects.filter(...) turned up anything, but do not need to insert anything. My code so far is:
user_pass = log_in(request.POST) # form class
if user_pass.is_valid():
...
- 11.3k
50
votes
6
answers
28k
views
Create Ruby on Rails views (only) after controllers and models are already created
I've obtained a project that have controllers (minimal code only) and models, but the views are missing. Is there a way to generate the views only using scaffold or another tool?
- 2,038
44
votes
3
answers
50k
views
Django Pass Multiple Models to one Template
I am building an address book that includes the relationships between entries, etc. I have separate models for Individuals, Companies, Venues, and Roles. On my index page I would like to list all of ...
- 1,235
27
votes
4
answers
18k
views
Backbone change model of View
I am fairly new to Backbone and have the following question:
I have a collection of models.
I have a collection view displaying tabs (with a view for each model in the collection).
I have a view ...
- 789
26
votes
4
answers
18k
views
What are the Laravel naming conventions for controllers/models/views?
I remember hearing you should name your controllers, models and views in a special way. Either singular or plural. I don't remember which ones to name what though, and i can't find anything about it ...
- 5,246
16
votes
3
answers
55k
views
Using datetime to compare with dates in Django
I have a question in Django on how you can compare dates to solve some solutions. For example I have a datefield in my models.py Like below.
class Invoice(models.Model):
payment_date = models....
- 1,587
13
votes
4
answers
25k
views
MVC Error: The model item passed into the dictionary is null
I'm just trying to build a view but I'm getting the following error:
System.InvalidOperationException: The
model item passed into the dictionary
is null, but this dictionary requires
a non-...
- 16.6k
13
votes
1
answer
5k
views
Good Practice: Organizing views.py in Django Apps
I am learning Django. My background is from PHP and Java with experience using Model View Controller frameworks. I have always had a seperate file for each of my views, models, and templates - but the ...
user1924060
13
votes
7
answers
7k
views
Delphi: Good pattern/strategy for view <-> model synchronization
There's a lot of talk about model-view-controller, model-view-viewmodel, model-view-presenter and so on these days.
What do you see as the best pattern for use with delphi and non-data aware ...
- 12.9k
12
votes
0
answers
637
views
Model View Presenter nesting
I've run into a scenario which requires nesting of the MVP pattern. It is probably best to explain using a visual example:
------------------------------
| [View] |
| | ...
- 1,021
10
votes
6
answers
4k
views
MVC: Where should I format data?
I get data from Model (an array with data) and I need to display with a specific format. I need to iterate over the array, format the data and then display it. Where should I format data to display? ...
- 101
10
votes
1
answer
5k
views
Communication between the View and Model in MVC
After reading from many different sources, I am very confused about how View and Model should communicate in the MVC pattern. To my understanding, the accepted answer of this post and this article ...
- 13k
9
votes
1
answer
3k
views
Why is this rails view spitting out a raw array at the end of an .each do loop? [duplicate]
I am stumped by this strange output in my Rails view. Here is my model:
class Comment < ActiveRecord::Base
belongs_to :post
end
Here is the relevant part of my view. I have isolated the ...
- 774
9
votes
2
answers
23k
views
How do I get the first name and last name of a logged in user in Django?
I need to get the first name and last name of a user for a function in my views How do I do that? What is the syntax for it? I used request.user.email for the email, but I don't know see an option for ...
- 1,828
9
votes
4
answers
20k
views
Extjs4 MVC, how get Model or View from a Controller class?
Ext.define('DigitalPaper.controller.Documents', {
extend: 'Ext.app.Controller',
views: ['Documents'],
stores: ['Documents'],
models: ['Documents'],
init: function() {
console.log('[OK] ...
9
votes
3
answers
4k
views
About view models and interfaces
I'm developing a WPF Prism application, and everything is working fine. My view models all have interfaces, which are injected by MEF.
However, I don't really understand the benefit of interfaces for ...
- 13.4k
8
votes
1
answer
4k
views
MvcMailer: Taking user input in view through model and then inserting it into mail
I don't know if I am explaining this correctly, or if the solution is rather simple, so here goes:
I am using MvcMailer, but before that I set up a wizard input form which I call Quote.cshtml. Behind ...
- 1,200
8
votes
1
answer
11k
views
How to save other data after form_valid action in django UpdateView?
I have successfully changed a particular field net in my object based on the quantity qty field with the following code.
class OrderDetailsProductEdit(UpdateView):
model = OrdersPlaced
fields ...
- 5,720
8
votes
4
answers
8k
views
MVC3 pass @model to partial view
I have two partial views which are exactly the same, but for the @model.
@model Project.Models.X
@model Project.Models.Y
How could I pass this model type to the view so that I can use the same view ...
- 1,919
8
votes
3
answers
2k
views
ASP.NET MVC ViewModelBuilder Suggestions
For anything but trivial view models, I use a view model builder that handles the responsibility of generating the view model object. Right now, I use constructor injection of the builders into my ...
- 2,463
7
votes
1
answer
7k
views
DJANGO: how to limit inlineformset queryset
An EU can use this form to select the roles (Project Manager, Developer etc) they play for any given project. I want to limit the project field options to only those in the employees department. Right ...
- 6,178
7
votes
2
answers
2k
views
Storing persistent information about items in view
I've my own view based directly on QAbstractItemView.
Generally speaking I need to store some information about particular model's item.
So in my view I have a map from QModelIndex to struct ...
- 4,323
7
votes
1
answer
7k
views
MVC - do I need to use Controller in the View?
As I know in the standard implementation of the MVC we pass Controller and Model to the View
But Im a little bit disagree with this idea. I dont want my view to know about both controller and model (...
- 18.6k
7
votes
10
answers
853
views
Do you buy the reuse story for the presentation layer in MVP and its variations? [closed]
Besides the unit testing benefits, what I heard regarding MVP pattern was that the reusability of the presentation layer. So, you would design one presentation layer and use it for WinForms (rich) ...
- 1,620
7
votes
1
answer
21k
views
building a 3d model viewer android? [duplicate]
I'm trying to build a model viewer in opengl, but got stumped... I basically just want to build my own app that can load a custom model in .off or .obj format and display it on my tablet.
user868935
6
votes
3
answers
2k
views
ASP.NET MVC model validation breaks MVC rule?
using ASP.NET MVC, I have a Model, to which I'm attaching attributes so that I can get use the MVC Model bound validation, but to doesn't this break the rule of MVC, where you are putting items that ...
- 4,409
6
votes
2
answers
7k
views
Do you initialize your Backbone views from within a model or elsewhere?
Do you initialize your Backbone views from within a model or elsewhere?
I'm trying to figure out what the best way to organize model/views. Does it make sense to have your models initialize the ...
- 11.2k
6
votes
3
answers
14k
views
"Unknown column 'user_id' error in django view
I'm having an error where I am not sure what caused it.
Here is the error:
Exception Type: OperationalError
Exception Value:
(1054, "Unknown column 'user_id' in 'field list'")
Does anyone ...
- 6,571
6
votes
1
answer
11k
views
Access modelData within delegate in QML
Is there a way to access modelData from View delegate (Repeater in particular).
I tried to use a separate property and tried to access it via model.modelData but neither of this worked.
Please see ...
- 640
6
votes
3
answers
5k
views
What is the advantage of Model-View-Controller (MVC) over Model-View?
Could anyone give an example of why it would be advantageous to use MVC instead of a simpler Model and a View only.
Note: whether it's called MVC or MVP (Model-View-Presenter), I'm talking about the ...
- 155
6
votes
1
answer
3k
views
Django - One view, multiple URLs?
I am fairly new to both Python and Django and would like to follow best practices where possible. I would like to tidy up the following code to make it easier to work with.
I am trying to set up a ...
- 6,363
6
votes
1
answer
5k
views
How does the model update the view in MVC pattern?
I have a confusion about the structure of MVC pattern.
In some places while searching on google I found that the model updates all those views which are subscribed to that model. How the model ...
- 2,455
6
votes
1
answer
2k
views
Oracle materialized view with Entity Framework model
Is it possible to query Oracle materialized view with Entity Framework model using linq?
- 115
5
votes
3
answers
28k
views
YII : How to Change datetime format displayed on the View
A newbie question in Yii:
I have a model of a table in Yii that contain a datetime field.
I'm using CActiveForm to display this field:
<div class="row">
<?php echo $form->labelEx($...
- 495
5
votes
1
answer
2k
views
Ruby on Rails: Get next item in model
Say I have simply ran rails g scaffold book name:string about:text On the 'show' view, how would I implement a button to go to the next item in the model.
I can't simply do @next = @book.id + 1 ...
- 980
5
votes
3
answers
2k
views
Laravel - Lot of Accessors (Mutators) for rendering Views with Blade
I have a Laravel 7 project with the need of a lot of data transformation from the model to the views before being displayed.
I thought about using Laravel Accessors and use them directly in my blade....
- 116
5
votes
2
answers
8k
views
Object is not iterable: Filtering QuerySet to display latest instance
I am trying to create a filter in a QuerySet using Django that returns the most recent instance that was submitted by the current logged in user.
I so far have the following in my view.py file:
def ...
- 291
5
votes
1
answer
3k
views
Qt models behind proxies and fetchMore()/canFetchMore()
I am interested to know how would views behave in cases when the main data model with incremental data fetching is behind a proxy or chain of proxies.
How proxy which does item rearrangements like ...
- 772
5
votes
2
answers
17k
views
Django Adding Values to ForeignKey
I'm trying to set up a way for users to "watch" certain items (i.e. add items to a list containing other items by other users):
class WatchList(models.Model):
user = models.ForeignKey(User)
...
- 9,269
5
votes
1
answer
4k
views
Ember not updating the view on model change
This fiddle has the starter kit recreated, with and extra button that alters the model.
http://jsfiddle.net/UjacC/1/
However, when clicking change, the array changes, but the view is not being ...
- 6,828
5
votes
1
answer
2k
views
Get array from model to view
In my model I have one int object and a boolean array:
public class mymodel
{
public int Round { get; set; }
public Boolean[] lstLabs { get; set; }
}
In my view I write this :
<script type="...
- 7,495
5
votes
1
answer
6k
views
In QT, chaining models does not work as expected
Alright, I have a really basic QStandardItemModel, filled with some numbers. I managed to display it in a QTableView, it's ok. I created a new model ( subclass either of QAbstractItemModel or ...
Veress Krisztian
5
votes
1
answer
6k
views
Updating Model from form in Backbone
I am creating a simple application using Backbone and Laravel to manage bookings, and I'm working on a simple form to update user data for the currently signed in user.
I was wondering, is there a ...
user1659697
5
votes
3
answers
3k
views
Using MVC, how should one handle communication between Views? Between Models?
Question number three in my quest to properly understand MVC before I implement it:
I have two cases in mind:
The primary application
window needs to launch the
preferences window. (One View
...
- 3,870
5
votes
1
answer
3k
views
When should I use user.get_profile in django?
I saw another answer here and other places on the web that recommend using user.get_profile when extending the built-in django user. I didn't do that in the below example. The functionality seems ...
- 5,064
4
votes
3
answers
315
views
Is it bad to use a model directly from a view in codeigniter?
I know normally the data is passed thru to the view with the controller. however, currently in my view I load my model ($this->load->model('Db_model');) so i can use it in a loop to retrieve a users ...
- 41
4
votes
2
answers
5k
views
Yii2: call custom method in class User from view
I would like to extend my own user model, with a function called getFirstname.
The function should return a custom field in the database.
But when I extend the user model. It says "Calling unknown ...
- 2,407
4
votes
1
answer
6k
views
How to synchronize Model and View Model bidirectional in MVVM?
It's a simple question and I searched the Internet for hours without success...
I have a model and a view model with one property. To make this property viewable in the view, I use a view-model-...
4
votes
1
answer
4k
views
MVC 3, View Model for user registration process. Password validation not working properly
I am trying to create a user registration page using MVC 3, so that I can better understand the process of how it works, what's going on behind the scenes etc. I am running into some issues when ...
- 1,272
4
votes
2
answers
1k
views
In MVC frameworks (such as Ruby on Rails), does usually Model spell as singular and controller and view spell as plural?
I usually see Ruby on Rails books using
script/generate model Story name:string link:string
which is a singular Story, while when it is controller
script/generate controller Stories index
then the ...
- 149k