Question

我有2个ArrayField列表，我想使用zip方法将它们加入，因此我可以在Django我的Django模板的两个列表中进行迭代。但是输出将每个数组都视为单独的列表。

我的模特

class programas(models.Model):
    title = models.CharField(unique=True, max_length=250)
    script = ArrayField(models.CharField(max_length=8000, blank=True))
    created_on = models.DateTimeField()
    show_date = models.CharField(max_length=300, blank=True, null=True)
    script_eng = ArrayField(models.CharField(max_length=8000, blank=True))
    description = models.CharField(max_length=2000, blank=True, null=True)
    description_eng = models.CharField(max_length=2000, blank=True, null=True)
    url = models.CharField(max_length=200, blank=True, null=True)
    show_id = models.IntegerField(primary_key=True)
    id = models.IntegerField(null=True)

我尝试加入列表的视图

def pages(request, id):

   obj = programas.objects.get(id=id)
   script = programas.objects.values_list('script')
   script_eng = programas.objects.values_list('script_eng')
   zip_scripts = list(zip(script , script_eng))


   context = {'title': obj.title,
              'show_date': obj.show_date,
              'script' : obj.script,
              'script_eng': obj.script_eng,
              'description': obj.description,
              'description_eng': obj.description_eng,
              'show_id':obj.show_id,
              'url': obj.url,
              'zip_scripts' : zip_scripts,
               }


   return render(request, 'rtves/pages.html', context)

我在模板页面上的代码

  {% if script %}             

            {% for text1, text2 in zip_scripts  %}                  
            <p> {{ text1  }} </p> 
            <p> {{ text2  }} </p>
            {% endfor %}

         {% else %} 
         <p>Nothing here</p>
         {% endif %}

我必须在数据库中进行更改吗？

Answer 1

programas.objects.values_list('script')为您提供了 all 数据库中programas对象的脚本字段的列表。因此，您实际上有一个列表列表。

您可能想要的只是您已经拥有的对象中的字段。因此，无需在那里使用values_list。

obj = programas.objects.get(id=id)
script = obj.script
script_eng = obj.script_eng

或者，直接将它们传递到zip（注意，无论如何都不需要list）：

obj = programas.objects.get(id=id)
zip_scripts = zip(obj.script, obj.script_eng)

Answer 2

从您的角度来看它“不起作用”的原因是因为当您将查询集转换为内置可迭代对象时，您不会得到一个可迭代值，但可迭代一个项目元组，例如

Exception in thread "main" com.google.protobuf.InvalidProtocolBufferException: While parsing a protocol message, the input ended unexpectedly in the middle of a field.  This could mean either that the input has been truncated or that an embedded message misreported its own length.
    at com.google.protobuf.InvalidProtocolBufferException.truncatedMessage(InvalidProtocolBufferException.java:84)
    at com.google.protobuf.CodedInputStream$ArrayDecoder.readRawBytes(CodedInputStream.java:1253)
    at com.google.protobuf.CodedInputStream$ArrayDecoder.readBytes(CodedInputStream.java:907)
    at com.google.protobuf.UnknownFieldSet$Builder.mergeFieldFrom(UnknownFieldSet.java:506)
    at com.google.protobuf.UnknownFieldSet$Builder.mergeFrom(UnknownFieldSet.java:483)
    at com.google.protobuf.UnknownFieldSet$Builder.mergeFrom(UnknownFieldSet.java:596)
    at com.google.protobuf.UnknownFieldSet$Builder.mergeFrom(UnknownFieldSet.java:274)
    at com.google.protobuf.CodedInputStream$ArrayDecoder.readGroup(CodedInputStream.java:828)
    at com.google.protobuf.UnknownFieldSet$Builder.mergeFieldFrom(UnknownFieldSet.java:510)
    at com.google.protobuf.GeneratedMessageV3.parseUnknownField(GeneratedMessageV3.java:298)
    at com.jd.ai.algor.easydl.core.model.flow.strategy.impl.StudentInfoOuterClass$Student.<init>(StudentInfoOuterClass.java:98)
    at com.jd.ai.algor.easydl.core.model.flow.strategy.impl.StudentInfoOuterClass$Student.<init>(StudentInfoOuterClass.java:44)
    at com.jd.ai.algor.easydl.core.model.flow.strategy.impl.StudentInfoOuterClass$Student$1.parsePartialFrom(StudentInfoOuterClass.java:670)
    at com.jd.ai.algor.easydl.core.model.flow.strategy.impl.StudentInfoOuterClass$Student$1.parsePartialFrom(StudentInfoOuterClass.java:664)
    at com.google.protobuf.AbstractParser.parsePartialFrom(AbstractParser.java:158)
    at com.google.protobuf.AbstractParser.parseFrom(AbstractParser.java:191)
    at com.google.protobuf.AbstractParser.parseFrom(AbstractParser.java:203)
    at com.google.protobuf.AbstractParser.parseFrom(AbstractParser.java:208)
    at com.google.protobuf.AbstractParser.parseFrom(AbstractParser.java:48)
    at com.jd.ai.algor.easydl.core.model.flow.strategy.impl.StudentInfoOuterClass$Student.parseFrom(StudentInfoOuterClass.java:291)
    at com.jd.ai.algor.easydl.core.model.flow.strategy.impl.SettlementDatasetValidateStrategy.main(SettlementDatasetValidateStrategy.java:79)

当您压缩并列出时，它变得更加奇怪，但是您可以使用

[('bill',), ('while',), ('participant',), ('you',)]

在您的情况下，整个代码大致为

list(map(o.itemgetter(0), qs))

加入2个列表Django

2 个答案: