本文介绍了如何在django-import-export中导入django-taggit标签的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我无法使用Django-import-export导入Django-taggit标签.
I can't import Django-taggit tags using Django-import-export.
此错误是在输入值时出现的.
This error is when the value is entered.
Line number: 1 - invalid literal for int() with base 10: 'def'
此外,此错误是当值为空白时.
Also, this error is when the value is blank.
Line number: 2 - Cannot add <QuerySet []> (<class 'django.db.models.query.QuerySet'>). Expected <class 'django.db.models.base.ModelBase'> or str.
我还在此问题中发布了问题
xlsx表也有一个id列.
models.py
from django.db import models
from django.urls import reverse
from taggit.managers import TaggableManager
class KnowHow(models.Model):
author = models.ForeignKey('auth.User',on_delete=models.CASCADE)
title = models.CharField(max_length=200)
text = models.TextField(blank=True)
file = models.FileField(blank=True,upload_to='explicit_knowhows')
free_tags = TaggableManager(blank=True)
def __str__(self):
return self.title
admin.py
from django.contrib import admin
from import_export import resources
from import_export import fields
from import_export.admin import ImportExportModelAdmin
from .models import KnowHow
# Register your models here.
class KnowHowResource(resources.ModelResource):
class Meta:
model = KnowHow
import_id_fields = ['id']
@admin.register(KnowHow)
class knowHowAdmin(ImportExportModelAdmin):
resource_class = KnowHowResource
推荐答案
我的解决方案:
自定义小部件:
from import_export import fields
from import_export import widgets
from taggit.forms import TagField
from taggit.models import Tag
class TagWidget(widgets.ManyToManyWidget):
def render(self, value, obj=None):
return self.separator.join(
[obj.name for obj in value.all()]
)
def clean(self, value, row=None, *args, **kwargs):
values = TagField().clean(value)
return [
Tag.objects.get_or_create(name=tag)[0]
for tag in values
]
然后我们还必须覆盖字段:
Then we have to override field as well:
class TagFieldImport(fields.Field):
def save(self, obj, data, is_m2m=False):
# This method is overridden because originally code
# getattr(obj, attrs[-1]).set(cleaned, clean=True) doesn't unpack cleaned value
if not self.readonly:
attrs = self.attribute.split('__')
for attr in attrs[:-1]:
obj = getattr(obj, attr, None)
cleaned = self.clean(data)
if cleaned is not None or self.saves_null_values:
if not is_m2m:
setattr(obj, attrs[-1], cleaned)
else:
# Change only here
getattr(obj, attrs[-1]).set(*cleaned, clean=True)
然后在这样的资源中使用:
And then to use in the resource like that:
tags = cure_widgets.TagFieldImport(
attribute="tags",
column_name="tags",
widget=cure_widgets.TagWidget(Tag, separator=", ")
)
这篇关于如何在django-import-export中导入django-taggit标签的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!