Django-如何将数据添加到Manytomany字段模型

Question

我有以下模型，查看和模板：

models.py：

class Batch(models.Model):
    material_id = models.ManyToManyField(AssetMetadata)
    user = models.ForeignKey(User)
    def __str__(self):
        return 'Batch_' + str(self.pk) + '_' + self.user.username
class AssetMetadata(models.Model):
    material_id = models.CharField(max_length=256, blank=True)
    series_title = models.CharField(max_length=256, blank=True)
    season_title = models.CharField(max_length=256, blank=True)
    season_number = models.IntegerField(default=0)
    episode_title = models.CharField(max_length=256, blank=True)
    episode_number = models.IntegerField(default=0)
    synopsis = models.TextField(max_length=1024, blank=True)
    ratings = models.CharField(max_length=256, blank=True)
    def __str__(self):
        return self.material_id

views.py：

def assets_in_repo(request):
    asset_list = AssetMetadata.objects.order_by('id').all()
    page = request.GET.get('page', 1)
    paginator = Paginator(asset_list, 50)
    try:
        assets = paginator.page(page)
    except PageNotAnInteger:
        assets = paginator.page(1)
    except EmptyPage:
        assets = paginator.page(paginator.num_pages)
    if request.method == 'POST':
        batch_list = request.POST.getlist('batch')
        print(batch_list)
    return render(request, 'assets_db/assets.html', {'assets': assets})

模板的摘要：

<form method="post">{% csrf_token %}
    <input type="submit" value="Create Batch" align="right">
    <table class="table table-striped" id="myTable">
        <tr>
            <th>ID</th>
            <th>Material ID</th>
            <th>Series Title</th>
            <th>Season Tile</th>
            <th>Season Number</th>
            <th>Episode Title</th>
            <th>Episode Number</th>
            <th>Create Batch</th>
        </tr>
        {%  for i in assets %}<tr>
            <td>{{i.pk}}</td>
            <td><a href="/repo/{{ i.id}}">{{i.material_id}}</a></td>
            <td>{{i.series_title}}</td>
            <td>{{i.season_title}}</td>
            <td>{{i.season_number}}</td>
            <td>{{i.episode_title}}</td>
            <td>{{i.episode_number}}</td>
            <td>
                <input type="checkbox" name="batch" value="{{i.pk}}">
            </td>
        </tr>{% endfor %}
    </table>
    </form>

我试图从复选框中获取数据并将其保存在Batch模型中。

用户选择资产来创建批处理，表单返回AssetMetadata中这些资产的pk，并且选择在列表中存储在通过batch_list = request.POST.getlist('batch')创建的列表中。我想使用该列表中存储的数据来创建Batch中的新条目，然后链接到AssetMetadata中的资产pk。

我已经能够在Django管理页面上成功完成此操作，但理想情况下，我可以在Teh View中这样做。

我已经阅读了https://docs.djangoproject.com/en/1.10/ref/models/relations/和search stackoverflow，但我很困惑。

Answer 1

info = Batch.objects.create(season_title ='foo', .....)
info2= AssetMetadata.objects.create(material_id ='some')
info.material_id.add(info2)

尝试这样的东西

Answer 2

我认为你需要

obj = AssetMetadata.objects.get(id=pk)
obj.batch_set.add(* batch_list)

Answer 3

感谢两个答案的帮助，我能够使这个工作，这就是我的工作方式：

def assets_in_repo(request):
    asset_list = AssetMetadata.objects.order_by('id').all()
    page = request.GET.get('page', 1)
    paginator = Paginator(asset_list, 50)
    try:
        assets = paginator.page(page)
    except PageNotAnInteger:
        assets = paginator.page(1)
    except EmptyPage:
        assets = paginator.page(paginator.num_pages)
    if request.method == 'POST':
        batch_list = request.POST.getlist('batch')
        info = Batch.objects.create(user_id=request.user.id)
        for item in batch_list:
            info.material_id.add(item)