Python django 全文搜索 taggit

我的应用程序-基础知识

我有一个简单的Django应用程序，它允许存储有关某些物品的信息，我正在try 实现一个搜索视图/功能.

我使用django-taggit来根据它们的功能/特性来标记这些项目.

我想要实施的是

我想实现一个全文搜索，允许搜索在所有领域的项目，包括他们的标签.

《问题》(S)

1. 在结果视图上，标记的项目会多次出现(每个标记出现一次)
2. 当我在搜索字段中只指定*单个*标签时，排名是正确的，但当我指定multiple个标签名称时，我会得到意想不到的排名结果.

我怀疑SearchVector()没有像我预期的那样解析标记关系.在本例中，应将标记视为单词列表.

示例代码

Models.py

from django.db import models
from taggit.managers import TaggableManager

class Item(models.Model):
    identifier = models.SlugField('ID', unique=True, editable=False)
    short_text = models.CharField('Short Text', max_length=100, blank=True)
    serial_number = models.CharField('Serial Number', max_length=30, blank=True)
    revision = models.CharField('Revision/Version', max_length=30, blank=True)
    part_number = models.CharField('Part Number', max_length=30, blank=True)
    manufacturer = models.CharField('Manufacturer', max_length=30, blank=True)
    description = models.TextField('Description', blank=True)
    tags = TaggableManager('Tags', blank=True)
    is_active = models.BooleanField('Active', default=True)

Forms.py

from django import forms

class SearchForm(forms.Form):
    search = forms.CharField(max_length=200, required=False)
    active_only = forms.BooleanField(initial=True, label='Show active items only', required=False)

Views.py

from django.views.generic.list import ListView
from django.contrib.postgres.search import SearchQuery, SearchVector, SearchRank

from . import models
from . import forms

class ItemListView(ListView):
    form_class = forms.SearchForm
    model = models.Item
    fields = ['serial_number', 'part_number', 'manufacturer', 'tags', 'is_active']
    template_name_suffix = '_list'

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['form'] = self.form_class(self.request.GET)
        return context

    def get_queryset(self):
        queryset = super().get_queryset()
        form = self.form_class(self.request.GET)
        if form.is_valid():
            if form.cleaned_data['active_only']:
                queryset = queryset.filter(is_active=True)

            if not form.cleaned_data['search']:
                return super().get_queryset()

            search_vector = SearchVector('identifier', 'short_text', 'serial_number', 'revision', 'part_number',
                                         'manufacturer', 'description', 'tags')
            search_query = SearchQuery(form.cleaned_data['search'], search_type='websearch')
            return (
                queryset.annotate(
                    search=search_vector, rank=SearchRank(search_vector, search_query)
                )
                # .filter(search=search_query)
                .order_by("-rank").distinct()
            ) #.filter(search__icontains=form.cleaned_data['search'],)
        return super().get_queryset()