我试图在下面列出的TranslationRequest
型号上创建唯一约束。 TranslationRequest
与另一个Django应用程序中存在的MachineTranslator
模型有外键关系。当我尝试运行syncdb时,出现以下错误:Error: One or more models did not validate: wt_articles.translationrequest: "unique_together" refers to translator, a field that doesn't exist. Check your syntax.
执行syncdb时,Django unique_together不允许跨应用程序使用ForeignKey字段
当我从unique_constraint
规范中删除translator
时,syncdb运行正常。注意:我使用Sqlite3作为我的后端数据库。
以下是TranslationRequest
和SourceArticle
的定义。
from wt_translation.models import MachineTranslator
class TranslationRequest(models.Model):
article = models.ForeignKey(SourceArticle)
target_language = models.ForeignKey(Language, db_index=True)
date = models.DateTimeField(_('Request Date'))
translator = models.ForeignKey(MachineTranslator),
status = models.CharField(_('Request Status'),
max_length=32,
choices=TRANSLATION_STATUSES)
class Meta:
unique_together = ("article", "target_language", "translator")
class SourceArticle(models.Model):
title = models.CharField(_('Title'), max_length=255)
language = models.ForeignKey(Language, db_index=True)
timestamp = models.DateTimeField(_('Import Date'), default=datetime.now())
doc_id = models.CharField(_('Document ID'), max_length=512)
source_text = models.TextField(_('Source Text'))
sentences_processed = models.BooleanField(_('Sentences Processed'))
这里是MachineTranslator
定义,在一个不同的(但引用Django应用程序)。
class MachineTranslator(models.Model):
shortname = models.CharField(_('Name'), max_length=50)
supported_languages = models.ManyToManyField(LanguagePair)
description = models.TextField(_('Description'))
type = models.CharField(_('Type'), max_length=32, choices=TRANSLATOR_TYPES, default='Serverland'),
timestamp = models.DateTimeField(_('Refresh Date'), default=datetime.now())
is_alive = models.BooleanField()
并非所有的依赖包含在此代码示例中。谢谢你的帮助!
谢谢,这是一个愚蠢的错误。显然这个逗号只在尝试通过unique_together访问字段时给了我一个错误。否则,该字段可用于代码中的其他地方。 – 2010-12-29 12:39:16