Question

我正在使用django 1.8。我需要的是在多个字段中执行不区分大小写的 admin-search ，并允许用户使用AND，OR和NOT运算符以及一些组字如何用括号或引号。搜索示例：

棉和（红色或＆＃34;深蓝色＆＃34;）

我已经发现了django-advanced-filter和django-filter ...... 他们是过滤器！我还想让用户在搜索框中输入密钥。我知道 get_search_results 允许我们覆盖搜索行为，但在我为此编写代码之前，我想问一下是否有一个包可以为我做这个？请注意，我觉得使用haystack进行自定义搜索非常复杂。

Answer 1

在执行评论中提到的小编辑后，此answer似乎对我有用。然而，我不知道这是否是“正确”的做法。

以下是适用于django 1.8的更新代码：

from django.contrib import admin
from django.db import models
from bookstore.models import Book
from django.contrib.admin.views.main import ChangeList
import operator

class MyChangeList(ChangeList):
    def __init__(self, *a):
        super(MyChangeList, self).__init__(*a)

    def get_queryset(self, request):
        print dir(self)
        # First, we collect all the declared list filters.
        (self.filter_specs, self.has_filters, remaining_lookup_params,
         use_distinct) = self.get_filters(request)

        # Then, we let every list filter modify the queryset to its liking.
        qs = self.root_queryset
        for filter_spec in self.filter_specs:
            new_qs = filter_spec.queryset(request, qs)
            if new_qs is not None:
                qs = new_qs

        try:
            # Finally, we apply the remaining lookup parameters from the query
            # string (i.e. those that haven't already been processed by the
            # filters).
            qs = qs.filter(**remaining_lookup_params)
        except (SuspiciousOperation, ImproperlyConfigured):
            # Allow certain types of errors to be re-raised as-is so that the
            # caller can treat them in a special way.
            raise
        except Exception, e:
            # Every other error is caught with a naked except, because we don't
            # have any other way of validating lookup parameters. They might be
            # invalid if the keyword arguments are incorrect, or if the values
            # are not in the correct type, so we might get FieldError,
            # ValueError, ValidationError, or ?.
            raise IncorrectLookupParameters(e)

        # Use select_related() if one of the list_display options is a field
        # with a relationship and the provided queryset doesn't already have
        # select_related defined.
        if not qs.query.select_related:
            if self.list_select_related:
                qs = qs.select_related()
            else:
                for field_name in self.list_display:
                    try:
                        field = self.lookup_opts.get_field(field_name)
                    except Exception as ex:# models.FieldDoesNotExist:
                        print ex
                        pass
                    else:
                        if isinstance(field.rel, models.ManyToOneRel):
                            qs = qs.select_related()
                            break

        # Set ordering.
        ordering = self.get_ordering(request, qs)
        qs = qs.order_by(*ordering)

        # Apply keyword searches.
        def construct_search(field_name):
            if field_name.startswith('^'):
                return "%s__istartswith" % field_name[1:]
            elif field_name.startswith('='):
                return "%s__iexact" % field_name[1:]
            elif field_name.startswith('@'):
                return "%s__search" % field_name[1:]
            else:
                return "%s__icontains" % field_name

        if self.search_fields and self.query:
            orm_lookups = [construct_search(str(search_field))
                           for search_field in self.search_fields]
            or_queries = []
            for bit in self.query.split():
                or_queries += [models.Q(**{orm_lookup: bit})
                              for orm_lookup in orm_lookups]
            if len(or_queries) > 0:
                qs = qs.filter(reduce(operator.or_, or_queries))
            if not use_distinct:
                for search_spec in orm_lookups:
                    if admin.utils.lookup_needs_distinct(self.lookup_opts, search_spec):
                        use_distinct = True
                        break

        if use_distinct:
            return qs.distinct()
        else:
            return qs


@admin.register(Book)
class AdminBookstore(admin.ModelAdmin):
    list_display = ('title', 'author', 'description')
    search_fields = ('title', 'author', 'description')
    def get_changelist(*a, **k):
        return MyChangeList

django - 自定义管理搜索的最简单方法

1 个答案: