如何将一个应用程序的对象导入同一个 django 项目中的另一个应用程序？

Posted 2023-02-24

【中文标题】如何将一个应用程序的对象导入同一个 django 项目中的另一个应用程序？

【英文标题】：How to import an object of one app into another app in the same django project?

【发布时间】：2022-01-16 06:28:28

【问题描述】：

代码如下。

users.model.py

from django.contrib.auth.models import AbstractBaseUser, PermissionsMixin
from django.db import models
from django.utils import timezone
from django.utils.translation import gettext_lazy as _
from django.db import models
# from django.contrib.auth.models import User
from PIL import Image


from .managers import CustomUserManager

from django.contrib import admin

from django.contrib.auth.models import AbstractUser
from django.utils.translation import ugettext_lazy as _


class CustomUser(AbstractUser):
    username = None
    first_name = models.CharField('Name',max_length=200,unique=True)
    email = models.EmailField(_('email address'), unique=True)
    registration = models.IntegerField()
    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = []

    objects = CustomUserManager()

    def __str__(self):
        return self.email



class Profile(models.Model):
    user = models.OneToOneField(CustomUser, on_delete=models.CASCADE)
    image = models.ImageField(default='default.jpg', upload_to='profile_pics')

blog.model.py

from django.db import models
from django.utils import timezone
from django.urls import reverse
from django.conf import settings
from multiselectfield import MultiSelectField

from django import forms
from django.core.validators import MinValueValidator, MaxValueValidator
from PIL import Image




DAYS_OF_WEEK = [
    (0, '  Monday'),
    (1, '  Tuesday'),
    (2, '  Wednesday'),
    (3, '  Thursday'),
    (4, '  Friday'),
    (5, '  Saturday'),
    (6, '  Sunday'),
]



class PostManager(models.Manager):
    def like_toggle(self, user, post_obj):
        if user in post_obj.liked.all():
            is_liked = False
            post_obj.liked.remove(user)
        else:
            is_liked = True
            post_obj.liked.add(user)
        return is_liked



class Post(models.Model):
    author = models.ForeignKey(
        settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
    title = models.CharField('Doctor\'s Name',max_length=100)
    content = models.CharField('Specialty',max_length=100)
    chamber = models.CharField('Chamber\'s Name',max_length=200)
    address = models.CharField('Address',max_length=100, blank=True)
    fees = models.IntegerField(default=0)

    days = MultiSelectField('Available Days', choices= DAYS_OF_WEEK)

    start_time = models.TimeField('Chamber Beginning Time')
    end_time = models.TimeField('Chamber Ending Time')
    image = models.ImageField( upload_to='profile_pics')
    review = models.TextField()

    rating = models.IntegerField('Behavior')
    overall_rating = models.PositiveIntegerField(validators=[
            MaxValueValidator(10),
            MinValueValidator(0)
        ])


    liked = models.ManyToManyField(
        settings.AUTH_USER_MODEL, blank=True, related_name='liked')
    date_posted = models.DateTimeField(default=timezone.now)

    objects = PostManager()

    class Meta:
        ordering = ('-date_posted', )

    def get_absolute_url(self):
        return reverse('post_detail', kwargs='pk': self.pk)

    def save(self):
        super().save()  # saving image first

        img = Image.open(self.image.path) # Open image using self

        if (img.height > 1020 or img.width > 1920):
            new_img = (1020, 1920)
            img.thumbnail(new_img)
            img.save(self.image.path)  # saving image at the same path


class Comment(models.Model):
    post = models.ForeignKey(
        Post, related_name='comments', on_delete=models.CASCADE)
    author = models.ForeignKey(
        settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
    text = models.TextField()
    created_date = models.DateTimeField(default=timezone.now)
    approved_comment = models.BooleanField(default=True)

    def approve(self):
        self.approved_comment = True
        self.save()

    def get_absolute_url(self):
        return reverse("post_list")

    def __str__(self):
        return self.author

我创建了一个项目。在该项目中，有两个名为：用户和博客的应用程序。我将 CustomUsers 保存在配置文件中。 我想使用 user.model.py 文件的 first_name 字段值作为 blog.model.py 文件的标题字段。 我是 django 新手。帮我解决这个问题！

【参考方案1】：

在博客应用中做 from user.models import model1,model2

在用户应用程序中，您可以导入博客模型，如

from blog.models import model1,model2