When I started building this project, it went pretty smoothly. But when I reached the admin, list_display and list_editable clashed:
admin.py Code:
from django.contrib import admin
from .models import Article, Author
# Register your models here.
@admin.register(Article)
class ArticleAdmin(admin.ModelAdmin):
list_display = ['title', 'main_txt', 'date_of_publication']
list_editable = ['title', 'main_txt']
def __str__(self):
return self.title
@admin.register(Author)
class AuthorAdmin(admin.ModelAdmin):
list_display = ['first_name', 'last_name', 'join_date', 'email']
def __str__(self):
return f"{self.first_name} {self.last_name[0]}"
models.py:
from django.db import models
# Create your models here.
class Author(models.Model):
first_name = models.CharField(max_length=100)
last_name = models.CharField(max_length=100)
date_of_birth = models.DateField()
email = models.CharField(max_length=300)
phone_num = models.CharField(max_length=15)
join_date = models.DateField()
participated_art = models.ManyToManyField('Article', blank=True)
class Article(models.Model):
title = models.CharField(max_length=500)
date_of_publication = models.DateField()
creaters = models.ManyToManyField('Author', blank=False)
main_txt = models.TextField()
notes = models.TextField()
Error Code:
Exception in thread Django-main-thread:
Traceback (most recent call last):
File "C:\Users\Zhiyue\AppData\Local\Programs\Python\Python39\lib\threading.py", line 980, in _bootstrap_inner
self.run()
File "C:\Users\Zhiyue\AppData\Local\Programs\Python\Python39\lib\threading.py", line 917, in run
self._target(*self._args, **self._kwargs)
File "C:\Users\Zhiyue\PycharmProjects\djangoProject1\venv\lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "C:\Users\Zhiyue\PycharmProjects\djangoProject1\venv\lib\site-packages\django\core\management\commands\runserver.py", line 134, in inner_run
self.check(display_num_errors=True)
File "C:\Users\Zhiyue\PycharmProjects\djangoProject1\venv\lib\site-packages\django\core\management\base.py", line 546, in check
raise SystemCheckError(msg)
django.core.management.base.SystemCheckError: SystemCheckError: System check identified some issues:
ERRORS:
<class 'CodeJangoHome.admin.ArticleAdmin'>: (admin.E124) The value of 'list_editable[0]' refers to the first field in 'list_display' ('title'), which cannot be used unless 'list_display_links' is set.
System check identified 1 issue (0 silenced).
After I read the error, as shown above, I tried adding list_display_links = ['title', 'main_txt'] into the code:
@admin.register(Article)
class ArticleAdmin(admin.ModelAdmin):
list_display = ['title', 'main_txt', 'date_of_publication']
list_editable = ['title', 'main_txt']
def __str__(self):
return self.title
But it didn't work out the way it was supposed to. I got another error, that was between list_display_links and list_editable:
Exception in thread django-main-thread:
Traceback (most recent call last):
File "C:\Users\Zhiyue\AppData\Local\Programs\Python\Python39\lib\threading.py", line 980, in _bootstrap_inner
self.run()
File "C:\Users\Zhiyue\AppData\Local\Programs\Python\Python39\lib\threading.py", line 917, in run
self._target(*self._args, **self._kwargs)
File "C:\Users\Zhiyue\PycharmProjects\djangoProject1\venv\lib\site-packages\django\utils\autoreload.py", line 64, in wrapper
fn(*args, **kwargs)
File "C:\Users\Zhiyue\PycharmProjects\djangoProject1\venv\lib\site-packages\django\core\management\commands\runserver.py", line 134, in inner_run
self.check(display_num_errors=True)
File "C:\Users\Zhiyue\PycharmProjects\djangoProject1\venv\lib\site-packages\django\core\management\base.py", line 546, in check
raise SystemCheckError(msg)
django.core.management.base.SystemCheckError: SystemCheckError: System check identified some issues:
ERRORS:
<class 'CodeJangoHome.admin.ArticleAdmin'>: (admin.E123) The value of 'title' cannot be in both 'list_editable' and 'list_display_links'.
<class 'CodeJangoHome.admin.ArticleAdmin'>: (admin.E123) The value of 'main_txt' cannot be in both 'list_editable' and 'list_display_links'.
System check identified 2 issues (0 silenced).
So, with list_display, list_editable, and list_display_links, I have a problem fitting them into the code in admin.py.I don't exactly know how to use them so a bit of help would be useful.
Django automatically set the first column of list_display as a link to the change form.
You can either add another column (recommended), like
@admin.register(Article)
class ArticleAdmin(admin.ModelAdmin):
list_display = ['__str__', 'title', 'main_txt', 'date_of_publication']
list_editable = ['title', 'main_txt']
def __str__(self):
return self.title
or explicitly set list_display_links to None
@admin.register(Article)
class ArticleAdmin(admin.ModelAdmin):
list_display = ['title', 'main_txt', 'date_of_publication']
list_editable = ['title', 'main_txt']
list_display_links = None
def __str__(self):
return self.title
EDIT:
It is not required to put __str__ in list_display. It is just the first column of list_display that makes it special: Django automatically convert it to a link, if not specified.
PS: What can be used in list_display?
According to Django's docs,
Example list_displays:
@admin.display(descriptor='Title')
def upper_case_title(obj):
return obj.title.upper()
@admin.register(Article)
class ArticleAdmin(admin.ModelAdmin):
list_display = ['__str__', 'title', 'main_txt', 'date_of_publication']
# 1. list_display = ['id', 'title', 'main_txt', 'date_of_publication']
# 2. list_display = ['article_title', 'title', 'main_txt', 'date_of_publication']
# 3. list_display = ['__str__', 'title', 'main_txt', 'date_of_publication']
# 4. list_display = ['id_title', 'title', 'main_txt', 'date_of_publication']
list_editable = ['title', 'main_txt']
def __str__(self):
return self.title
To implement 4. you need to modify model definition
#models.py
from django.contrib import admin
from django.db import models
class Article(models.Model):
title = models.CharField(max_length=500)
date_of_publication = models.DateField()
creaters = models.ManyToManyField('Author', blank=False)
main_txt = models.TextField()
notes = models.TextField()
@admin.display(descriptor='Title')
def id_title(self):
return f'{self.id}. {self.title}'
Again, I am just giving examples, you are not required to code exactly as above.