[英]Django Search in Models with 3 fields
I have search fields, keyword, cdate_start, cdate_end.我有搜索字段、关键字、cdate_start、cdate_end。 They can be null.
它们可以是 null。 What I want is if keyword entered, get results the only keyword contained results.
我想要的是,如果输入了关键字,则获取结果中唯一包含关键字的结果。 If keyword not entered but cdate_start entered get items only greater than this cdate_start.
如果未输入关键字但输入了 cdate_start,则仅获取大于此 cdate_start 的项目。 Or keyword and cdate_end entered then get items only contains this keyword and less than cdate_end, and etc. I have to get all combinations like this.
或输入关键字和 cdate_end 然后获取项目仅包含此关键字且少于 cdate_end 等。我必须获取所有这样的组合。 I tried something like this.
我尝试过这样的事情。
if self.request.GET.get('feedback_s_keyword') is not None:
keyword = self.request.GET.get('feedback_s_keyword')
else:
keyword = ''
name_or = Q(author__name__icontains=keyword)
surname_or = Q(author__surname__icontains=keyword)
feedback_or = Q(feedback__icontains=keyword)
if self.request.GET.get('feedback_s_cdate_start') is not None:
cdate_start = self.request.GET.get('feedback_s_cdate_start')
cdate_start = cdate_start.split('/')
try:
year_s = cdate_start[0]
month_s = cdate_start[1]
day_s = cdate_start[2]
except:
year_s = 2001
month_s = 1
day_s = 1
else:
year_s = 2001
month_s = 1
day_s = 1
cdate_gte = Q(cdate__gte=datetime.date(year_s, month_s, day_s))
if self.request.GET.get('feedback_s_cdate_end') is not None:
cdate_end = self.request.GET.get('feedback_s_cdate_end')
cdate_end = cdate_end.split('/')
try:
year_e = cdate_end[0]
month_e = cdate_end[1]
day_e = cdate_end[2]
except:
year_e = 3000
month_e = 12
day_e = 31
else:
year_e = 3000
month_e = 12
day_e = 31
cdate_lte = Q(cdate__lte=datetime.date(year_e, month_e, day_e))
feedbacks = Feedback.objects.filter(name_or | surname_or | feedback_or | cdate_gte | cdate_lte).order_by(
"-cdate")
But of course, if cdate is not entered it returned everything.但是,当然,如果没有输入 cdate,它会返回所有内容。 I think I can set flags smth like keyword_entered =True, feedback_s_cdate_start_entered=True, feedback_s_cdate_end_entered=True and writing multiple if conditions and generate filters based on these flags.
我想我可以设置一些标志,比如keyword_entered =True、feedback_s_cdate_start_entered=True、feedback_s_cdate_end_entered=True并编写多个 if 条件并根据这些标志生成过滤器。
if keyword_entered and not feedback_s_cdate_start_entered and not feedback_s_cdate_end_entered:
feedbacks = Feedback.objects.filter(name_or | surname_or | feedback_or ).order_by(
"-cdate")
elif keyword_entered and feedback_s_cdate_start_entered and not feedback_s_cdate_end_entered:
feedbacks = Feedback.objects.filter(name_or | surname_or | feedback_or | cdate_gte).order_by(
"-cdate")
Above solutions is not looking good.上述解决方案看起来不太好。 How can I create such a search for it?
我怎样才能创建这样的搜索呢?
You make your task much more difficult by the confusing logic you use (Also a form would have been much easier to use than manually cleaning all this data).您使用的令人困惑的逻辑使您的任务变得更加困难(而且使用表单比手动清理所有这些数据要容易得多)。 Write simpler logic:
编写更简单的逻辑:
from datetime import datetime
filters = []
keyword = self.request.GET.get('feedback_s_keyword')
if keyword is not None:
name_contains = Q(author__name__icontains=keyword)
surname_contains = Q(author__surname__icontains=keyword)
feedback_contains = Q(feedback__icontains=keyword)
filters.append(name_contains | surname_contains | feedback_contains)
cdate_start = self.request.GET.get('feedback_s_cdate_start')
if cdate_start is not None:
start_date = datetime.strptime(cdate_start, '%Y/%m/%d')
filters.append(Q(cdate__gte=start_date))
# Any more filters
feedbacks = Feedback.objects.filter(*filters)
# filter(*filters) would mean something like `filter(q1, q2, q3)` meaning they would be ANDed.
# You can OR them by using functools.reduce(operator.or_, filters)
Note : Instead of doing all this manually look into using django-filter a great package to make filters (much easier to use than what you do).
注意:与其手动执行所有这些操作,不如使用django-filter一个很棒的 package 来制作过滤器(比你做的更容易使用)。
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