[ haystack-django配置 ]

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django-haystack配置

pip install django-haystack

# 使用es请安装
pip install "django-haystack[elasticsearch]"

本文展示用whoosh检索

import os
HAYSTACK_CONNECTIONS = {
    'default': {
        'ENGINE': 'haystack.backends.whoosh_backend.WhooshEngine',
        'PATH': os.path.join(os.path.dirname(__file__), 'whoosh_index'),
    },
}1

在app目录下索引文件 创建search_indexes.py

import datetime
from haystack import indexes
from myapp.models import Note


class NoteIndex(indexes.SearchIndex, indexes.Indexable):
    text = indexes.CharField(document=True, use_template=True)
    author = indexes.CharField(model_attr='user')
    pub_date = indexes.DateTimeField(model_attr='pub_date')

    def get_model(self):
        return Note

    def index_queryset(self, using=None):
        """Used when the entire index for model is updated."""
        return self.get_model().objects.filter(pub_date__lte=datetime.datetime.now())

在templates目录下创建 search/indexes/myapp/note_text.txt

{{ object.title }}
{{ object.user.get_full_name }}
{{ object.body }}

添加主视图

path('search/', include('haystack.urls')),

在templates目录下创建 search/search.html

{% block content %}
<h2>Search</h2>

<form method="get" action=".">
    <table>
        {{ form.as_table }}
        <tr>
            <td>&nbsp;</td>
            <td>
                <input type="submit" value="Search">
            </td>
        </tr>
    </table>

    {% if query %}
        <h3>Results</h3>

        {% for result in page.object_list %}
            <p>
                <a href="{{ result.object.get_absolute_url }}">{{ result.object.title }}</a>
            </p>
        {% empty %}
            <p>No results found.</p>
        {% endfor %}

        {% if page.has_previous or page.has_next %}
            <div>
                {% if page.has_previous %}<a href="?q={{ query }}&amp;page={{ page.previous_page_number }}">{% endif %}&laquo; Previous{% if page.has_previous %}</a>{% endif %}
                |
                {% if page.has_next %}<a href="?q={{ query }}&amp;page={{ page.next_page_number }}">{% endif %}Next &raquo;{% if page.has_next %}</a>{% endif %}
            </div>
        {% endif %}
    {% else %}
        {# Show some example queries to run, maybe query syntax, something else? #}
    {% endif %}
</form>
{% endblock %}

视图和模型

# views.py
from datetime import date

from haystack.generic_views import SearchView

class MySearchView(SearchView):
    """My custom search view."""

    def get_queryset(self):
        queryset = super().get_queryset()
        # further filter queryset based on some set of criteria
        return queryset.filter(pub_date__gte=date(2015, 1, 1))

    def get_context_data(self, *args, **kwargs):
        context = super().get_context_data(*args, **kwargs)
        # do something
        return context

# urls.py

urlpatterns = [
    path('/search/', MySearchView.as_view(), name='search_view'),
]

创建索引

# 创建
./manage.py rebuild_index
# 更新
./manage.py update_index