Foreign keys for treatment

Question

im does scrap with scrapy and my django model is:

class Creative(models.Model):
    name = models.CharField(max_length=200)
    picture = models.CharField(max_length=200, null = True)

class Project(models.Model):
    title = models.CharField(max_length=200)
    description = models.CharField(max_length=500, null = True)
    creative = models.ForeignKey(Creative)

class Image(models.Model):
    url = models.CharField(max_length=500)
    project = models.ForeignKey(Project)

And my scrapy model:

from scrapy.contrib.djangoitem import DjangoItem
from app.models import Project, Creative

class ProjectItems(DjangoItem):
    django_model = Project

class CreativeItems(DjangoItem):
    django_model = Creative

So when I save:

creative["name"]  = hxs.select('//*[@id="owner"]/text()').extract()[0]
picture  = hxs.select('//*[@id="owner-icon"]/a/img/@src').extract()
if len(picture)>0:
    creative["picture"] = picture[0]
creative.save()


# Extract title and description of the project
project["title"] = hxs.select('//*[@id="project-title"]/text()').extract()[0]
description = hxs.select('//*[@class="project-description"]/text()').extract()
if len(description)>0:
    project["description"] = description[0]
project["creative"] = creative
project.save()

I got an error:

Project.creative "must be an instance of Creative.

So how can I add a key value when testing?

Answer 1

This can be done by assigning the return value to the creative.save()value in project['creative']So, for example, in the following example, we use a variable djangoCreativeItemto transfer this information to the project:

creative["name"]  = hxs.select('//*[@id="owner"]/text()').extract()[0]
picture  = hxs.select('//*[@id="owner-icon"]/a/img/@src').extract()   
if len(picture)>0:
    creative["picture"] = picture[0]
djangoCreativeItem = creative.save()

# Extract title and description of the project
project["title"] = hxs.select('//*[@id="project-title"]/text()').extract()[0]
description = hxs.select('//*[@class="project-description"]/text()').extract()
if len(description)>0:
    project["description"] = description[0]
project["creative"] = djangoCreativeItem
project.save()

Answer 2

, creative_id, , :

 project["creative_id"] = creative.id

, ( Scrapy, ...).