Tag: django-models

Unable to use ManyToMany Field with Django and Postgres

I am working on a project with Django, Postgres. I typed that: When I type that: I got that: Then if I type that: I got that: Whereas the field name exists. Models.py: Answer M2M relationship means – you have many objects. user.food.name get attrbute name from M2M manager. Probably you mean user.food.all().name – this code get attrbute name of

Unsupported lookup ‘category’ for CharField or join on the field not permitted

django django-models django-views python

models.py: This is my views.py file. I show error at: bestseller = Product.objects.filter(product__category__icontains=’BestSeller’) views.py: I want to Bestseller category product at index.html I use Django 4 and pyhton 3.9 Answer You can’t use CharField as a ForeignKey. It should be like this: Or like this (the same logic): This will output all Products in category with name BestSeller.

How to run a forloop in django views.py?

django django-models django-views python

I want to iterate over a queryset and if there is a new user added, I want to add some points for a specific user. To be more clear with what i am building: => I am writing a referral system logic in django. The referral system works fine now, but what i want to implement is this. When i

Django join tables with ForeignKey

django django-models join python

I’m trying to join 3 tables with ForeignKey but it returns Null values. I’m using select related and also I tried Insight.objects.all() but both are not working. Here are my models: My View: Answer I solved my problem by the below, I could update the DB with the result of the below query

serializer not being called AttributeError: ‘str’ object has no attribute ‘_meta’

django django-models django-rest-framework django-views python

I modified the Auth User by using AbstractUser Class. Registered it in settings. Everything else is working I can create an instance using the User Model BUT The Problem comes during the serialization. My serializer doesn’t throw any error, but any time I try and use the serializer.data I get AttributeError: ‘str’ object has no attribute ‘_meta’. User Model Custom

Django query for column value search?

django django-models django-queryset postgresql python

What is the Django query for this? DB data – I only need record that contain “1.2.3” values not like – (“Cat 1.2.3” or “1.2.3-XY2” or any such value). And pattern “1.2.3” can be anywhere in column where column value can have comma separated values too. Desired Result – When i am performing below Django query – Getting all record

Rendering highest integer value from three models instances in django

django django-annotate django-models django-queryset python

I have three models which are related all to one model. I am rendering MyParentModel in DetailView (CBV) and passing related models as a context to render individual models ‘ranking’ field on the same template. Now I need to render same ‘ranking’ on MyParentModel ListView, but I only want to display ‘ranking’ which has highest value. Question is, how I

Is it better to use JsonField or multiple model fields for a Django Model?

database django django-models python python-3.x

For example, Or Assume that I have a limited (max 5) number of descriptions. Which approach is better and would be considered as good practice? Answer I am generally in favour of multiple models rather than using JSON, though there is still a time and a place for the JSON field. You have a number of description fields, you can

How can I make a user list of those who have given feedback on the particular product?

django django-models django-views python

I have made a feedback form. Now I want to make a user list of those who have given feedback on the particular product. My motive is, that if any user gives feedback on a particular product, he/she won’t be able to give another feedback on that particular product and can’t see the feedback form. A user can share just

Detail view is not displaying content of models

django django-class-based-views django-models django-templates python

My detail View in Django, isn’t successfully displaying the content selected from the listviews. The following is my code. Models.py: urls.py: Views.py: Html list view: Html detail view: I hope my query made sense. I don’t receive any error on myside, its just not working as it should. Answer The object data is passed as object and post_model, not Post,