I’ve created a Many-to-Many relationship for the model UserProfile, to enable users to grant access to a particular feature to one another. The relationship works as expected with the use of symmetrical=False to ensure a user access is one-way. Model I am able to query the users that a particular user w…
Tag: django
Update model field ( SearchVector ) using signals.py
I am trying to update search vector field using post_save signal. Through “Admin.py”, It is working perfectly, but through “Form page” , the searchVector field or any other field is not getting updated. In form page, I have many to many field – “Tag” that I save throu…
Django Filter for Model function
I am trying to filter through a TextField where I have stripped it of its HTML tags. However, it gives me this error: “Cannot resolve keyword ‘search’ into field.” Here is my code: models.py views.py Is there a way to do this? Answer I just found a way to get what I’m aiming at. …
How to return empty queryset from serializer.data Django Rest Framework
view.py serializer.py I want the serializer to return an empty response when no User DoesNotExist in the User Model, however I get the following error. How can i achieve this? Answer You are trying to serialize a queryset, so you need to add many=True to the serialization.
Output Dates in Celery Crontab Schedule to Django Template
I’m using Celery for my Django project and I’ve scheduled some crontab tasks to send emails out to users at certain times. I need to output a schedule in an HTML/Django template that shows the dates that users can expect the emails to go out on. My crontab schedule looks like this for Celery: I wa…
Import django models to custom python script
I am trying to create a custom python script within my Django application. This script requires the use of my app models. I am unable to figure out how to import the models appropriately to be used within this script. So if I wanted to access the pages.models from the custom_script.py how might I do this? I h…
Accessing model field in ManyToMany relation in Django
I am following the example in the documentation: https://docs.djangoproject.com/en/3.2/topics/db/models/#extra-fields-on-many-to-many-relationships In this case, given a Person object, how can I access all the groups that Person is in? Answer You access these with:
How to display legend in toolbox in Charts.js?
I created a scatter chart by using charts.js in my Django project. It is working clearly but in the toolbox, the legends name does not show just number is displaying. How can I display it? I want to display it as: Argentina(44015314.68,28) my code: Answer You can achieve this by using a custom callback to alt…
How to constraint and validate Django m2m and foreign key fields
I have these models: I want to add certain restrictions but I have difficulties with those models, since I hardly even see the need to add restrictions to related fields: How to avoid having “ClientInfo” entries if a “Client” has not created a relationship with it? How to prevent a …
Django Python annotate ManyToMany Relationship with additional information
my problem is the following. I have two models in the database, which I link together using a ManyToMany relationship. For the admin page I currently use “admin.TabularInline” to bind different objects to one via the graphic. I still want to specify an order in the connections, preferably numbers …