问题描述
我想为两个模型准备索引,因此我可以从两个模型中搜索文本。以下是我的代码。当我运行python manage.py rebuild_index时,我得到索引行return obj.mainparts.parts的错误raise self.related.model.DoesNotExist。
I want to prepare an index for two models, so I can search text from both models. Below is my code. When I run "python manage.py rebuild_index" I get the error "raise self.related.model.DoesNotExist" for the index line "return obj.mainparts.parts".
models.py
models.py
class Main(models.Model):
....#various fields
class Parts(models.Model):
main = models.OneToOneField(Main, primary_key=True, related_name='mainparts')
parts = models.TextField(blank=True)
search_indexes.py
search_indexes.py
class MainIndex(indexes.SearchIndex, indexes.Indexable):
text = indexes.CharField(document=True, use_template=True)
....#various fields from class Main
parts = indexes.CharField()
def prepare_parts(self, obj):
return obj.mainparts.parts
def get_model(self):
return Main
和main_text.txt:
and main_text.txt:
{{ object.parts}}
推荐答案
self.related.model.DoesNotExist
表示没有部件
haystack在出错时索引的 Main
对象的实例。在这种情况下,你可以捕获异常并返回一个空字符串:
self.related.model.DoesNotExist
means that there is no Parts
instance for the Main
object that haystack is indexing at the time of the error. You can catch the exception and just return an empty string ""
in that case:
# ...
def prepare_parts(self, obj):
try:
return obj.mainparts.parts
except Parts.DoesNotExist:
return ""
# ...
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