Question

我是django的新人我之前练习如何将数据保存到数据库中但现在我不知道如何查询我的数据请帮帮我。谢谢。

这是我的模特：我在MovieTheater上使用了Manytomanyfiled。

class Movie(models.Model):
    link = models.URLField()
    title = models.CharField(max_length=255, null=True)
    title_en = models.CharField(max_length=255, null=True)

class MovieTheater(models.Model):
    movietheater = models.ManyToManyField(Movie,null=True,blank=True,through="MovieShowtime")
    movie_theater = models.CharField(max_length=255, null=True)     

class MovieShowtime(models.Model):
    theater = models.ForeignKey( MovieTheater, null=True,blank=True,related_name = 'theater' )
    movie = models.ForeignKey( Movie, null=True,blank=True,related_name = 'movie' )
    time = models.TextField(null=True,blank=True)

在我的views.py中：

from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
from movie.models import Movie,MovieShowtime
from django.shortcuts import render 
def index(request):
    movies = Movie.objects.all()
    times = MovieShowtime.objects.all()
    contacts = get_paginator(request, movies, 10)
    return render(request, "movie/index.html",
                  {'contacts':contacts,'movies':movies,'times':times})

def get_paginator(request, object_list, num_per_page):
    paginator = Paginator(object_list, num_per_page)
    page = request.GET.get('page')
    try:
        ret = paginator.page(page)
    except PageNotAnInteger:
        ret = paginator.page(1)
    except EmptyPage:
        ret = paginator.page(paginator.num_pages)
    return ret

我的电影/ index.html：

<div class="activity">
    {% for movie in contacts %}
    <div class="col-md-12  item">
    <p><h3>{{ movie.title }}</h3></p>
           {{movie.id}}
        <div class="theater">
            {% for theater in movie.movietheater_set.all %}
                {{ theater.movie_theater }}
                {{ theater.id}}
                <!--I have to filter {{movie.id}} and  {{ theater.id}} to get the time like:
                MovieShowtime.objects.filter(movie_id='9',theater_id='5')So I can get the movietime.(I don't know if it is the normal way,It's what I can think now,please guide me)
                But I don't know how to do.
                -->
        {% endfor %}
        </div>
    </div>
{% endfor %}
</div>

Answer 1

{% for theater in movie.movietheater_set.all %}
   {% for showtime in theater.theater.all %}
       {{ showtime.time }}
   {% endfor %}
{% endfor %}

由于相关名称，令人困惑。相关名称是oposite实体将访问定义它的名称的名称。

如果你这样做：

class MovieShowtime(models.Model):
    theater = models.ForeignKey(MovieTheater, null=True, related_name='showtimes' )
    movie = models.ForeignKey(Movie, null=True, related_name='showtimes' )

然后您将访问MovieShowtime，如：

theater = MovieTheater.object.get(movie_theater='test')
for showtime in theater.showtimes.all:
  print "Movie: {} - Time: {}".format(showtime.movie.title, showtime.time)

Django通过manytomanyfield获取查询值

1 个答案: