models Questions
3
Solved
I am fairly new to Ruby on Rails, and I clearly have an active record association problem, but I can't solve it on my own.
Given the three model classes with their associations:
# application_for...
Wil asked 23/11, 2009 at 5:9
2
Solved
I have the following model classes:
class Category(models.Model):
category = models.CharField('category', max_length=200, blank=False)
class Book(models.Model):
title = models.CharField('title'...
2
I have the following column in SQLAlchemy:
name = Column(String(32), nullable=False)
I want that if no value is passed onto an insertion, it should enter a default value of either completely bla...
Virgilvirgilia asked 22/3, 2018 at 10:16
6
Solved
I tried to use UpperCase in all my CharField, in all my Django Model.
Today I have some code in my save method:
def save(self, *args, **kwargs):
for field_name in ['razao_social', 'nome_fantasi...
6
Solved
I know I can require a field by adding validates_presence_of :field to the model. However, how do I require at least one field to be mandatory, while not requiring any particular field?
thanks in ...
Demineralize asked 13/5, 2010 at 0:2
7
Solved
I have a PostgreSQL database for my Rails application. In the schema named 'public' the main Rails models tables are stored etc. I have created a 'discogs' schema which will have tables with names ...
Finella asked 10/1, 2012 at 15:59
3
Solved
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.Dat...
3
Solved
I was wondering if anybody knew of a way to do something like the following:
rails generate model Foo name:string, validates: {:name, uniqueness: true}
That is, whilst declaring a model generato...
Mountebank asked 3/12, 2013 at 19:9
5
Solved
This problem randomly started appearing for me. I know that Django generates its own ids but a lot my code has been using custom AutoFields which HAS been working. I added a new class today and tri...
4
Solved
Is it possible to override values inside a Model?
I am getting 'MyModel' object does not support item assignment.
my_model = MyModel.objects.get(id=1)
print my_model.title
if my_model.is_changed:...
4
Solved
Hi here's the specific line that I added in models.py
billingMonth2 = models.DateTimeField()
This is what happened in makemigrations, I figured I added a non nullable field so I tried to define a...
12
Solved
When running:
import spacy
nlp = spacy.load('en')
the following is printed:
Warning: no model found for 'en'
Only loading the 'en' tokenizer.
/site-packages/spacy/data is empty with the ex...
3
Solved
I have to move my UI page from a .cshtml file to an .aspx file. Now I'm having a couple of compiling errors.
First is that 'ViewBag' does not exist in the current context. Can I not use it in .asp...
Tartaric asked 1/3, 2016 at 0:17
3
Solved
I belive that the answer to my problem is simple, but I can't find it anywhere. Here is my predicament. I have two models: Member and MemberDetail, which are in oneToOne relation like this:
class ...
Electrojet asked 14/1, 2013 at 23:29
3
Solved
Is there anyway to use the Django shell to modify a field value? I can create, delete, and query models, but I don't know how to alter existing field values.
class Game(models.Model):
name = mod...
3
Solved
Which of the two is a better and efficient option to check if an instance exists. There can only be one record returned at most.
1) Use the filter option and see if it exists:
x = MyObject.object...
4
Solved
I have a Django application that reads data from a web API and puts it in a database.
Is there a way to create a new object from a mode but prevent the duplicate exception if the object already exi...
3
Solved
Apparently a form being loaded on my template is requiring a field that isn't being passed to it.
Can anyone tell me what is causing this error?
Error occurs during template rendering
In templa...
3
Solved
I have 2 models, Courses and Videos, for example. And Courses has many Videos.
// course.js
'use strict';
module.exports = (sequelize, DataTypes) => {
const Course = sequelize.define('Course'...
Hanway asked 11/2, 2018 at 13:53
7
Solved
I have been working on an offline version of my Django web app and have frequently deleted model instances for a certain ModelX.
I have done this from the admin page and have experienced no issues...
Trail asked 1/1, 2015 at 22:42
6
I want individual users to be able to upload their files into a single folder (so each user has their own root folder, where they can upload their own files), but I am not sure of the best way to g...
3
Ive been trying to create a django project that has users and those users can add titles of books they have created. But each time I enter a book title (not on the admin page) I get this error
Can...
3
Tensorflow API has provided few pre-trained models and allowed us to trained them with any dataset.
I would like to know how to initialize and use multiple graphs in one tensorflow session. I wan...
Dempster asked 7/10, 2017 at 7:9
3
Solved
I have 2 Django models :
class A(models.Model):
uniq_name = models.CharField(max_length=30,primary_key=True)
info1 = models.CharField(max_length=30)
info2 = models.CharField(max_length=30)
cl...
3
I've got a weird problem.
I am building a Flask app with SQLAlchemy. I have a file with models, namely, models.py. And I have a User model there.
If I open my "views.py" and insert a string
impo...
Parabolize asked 30/9, 2014 at 17:50
1 Next >
© 2022 - 2025 — McMap. All rights reserved.