day28 stark组件开发之组合搜索功能

思路

通用服务v1.py模块新增搜索功能

from django.db.models import ForeignKey, ManyToManyField
from stark.utils.pagination import Pagination

class SearchGroupRow(object):
    def __init__(self, title, queryset_or_tuple, option, query_dict):
        """

        :param title: 组合搜索的列名称
        :param queryset_or_tuple: 组合搜索关联获取到的数据
        :param option: 配置
        :param query_dict: request.GET
        """
        self.title = title
        self.queryset_or_tuple = queryset_or_tuple
        self.option = option
        self.query_dict = query_dict

    def __iter__(self):
        yield '<div class="whole">'
        yield self.title
        yield '</div>'
        yield '<div class="others">'
        total_query_dict = self.query_dict.copy()
        total_query_dict._mutable = True

        origin_value_list = self.query_dict.getlist(self.option.field)
        if not origin_value_list:
            yield "<a class='active' href='?%s'>全部</a>" % total_query_dict.urlencode()
        else:
            total_query_dict.pop(self.option.field)
            yield "<a href='?%s'>全部</a>" % total_query_dict.urlencode()

        for item in self.queryset_or_tuple:
            text = self.option.get_text(item)
            value = str(self.option.get_value(item))
            query_dict = self.query_dict.copy()
            query_dict._mutable = True

            if not self.option.is_multi:
                query_dict[self.option.field] = value
                if value in origin_value_list:
                    query_dict.pop(self.option.field)
                    yield "<a class='active' href='?%s'>%s</a>" % (query_dict.urlencode(), text)
                else:
                    yield "<a href='?%s'>%s</a>" % (query_dict.urlencode(), text)
            else:
                # {'gender':['1','2']}
                multi_value_list = query_dict.getlist(self.option.field)
                if value in multi_value_list:
                    multi_value_list.remove(value)
                    query_dict.setlist(self.option.field, multi_value_list)
                    yield "<a class='active' href='?%s'>%s</a>" % (query_dict.urlencode(), text)
                else:
                    multi_value_list.append(value)
                    query_dict.setlist(self.option.field, multi_value_list)
                    yield "<a href='?%s'>%s</a>" % (query_dict.urlencode(), text)

        yield '</div>'


class Option(object):
    def __init__(self, field, is_multi=False, db_condition=None, text_func=None, value_func=None):
        """
        :param field: 组合搜索关联的字段
        :param is_multi: 是否支持多选
        :param db_condition: 数据库关联查询时的条件
        :param text_func: 此函数用于显示组合搜索按钮页面文本
        :param value_func: 此函数用于显示组合搜索按钮值
        """
        self.field = field
        self.is_multi = is_multi
        if not db_condition:
            db_condition = {}
        self.db_condition = db_condition
        self.text_func = text_func
        self.value_func = value_func

        self.is_choice = False

    def get_db_condition(self, request, *args, **kwargs):
        return self.db_condition

    def get_queryset_or_tuple(self, model_class, request, *args, **kwargs):
        """
        根据字段去获取数据库关联的数据
        :return:
        """
        # 根据gender或depart字符串，去自己对应的Model类中找到 字段对象
        field_object = model_class._meta.get_field(self.field)
        title = field_object.verbose_name
        # 获取关联数据
        if isinstance(field_object, ForeignKey) or isinstance(field_object, ManyToManyField):
            # FK和M2M,应该去获取其关联表中的数据： QuerySet
            db_condition = self.get_db_condition(request, *args, **kwargs)
            return SearchGroupRow(title, field_object.remote_field.model.objects.filter(**db_condition), self, request.GET)
        else:
            # 获取choice中的数据：元组
            self.is_choice = True
            return SearchGroupRow(title, field_object.choices, self, request.GET)

    def get_text(self, field_object):
        """
        获取文本函数
        :param field_object:
        :return:
        """
        if self.text_func:
            return self.text_func(field_object)

        if self.is_choice:
            return field_object[1]

        return str(field_object)

    def get_value(self, field_object):
        if self.value_func:
            return self.value_func(field_object)

        if self.is_choice:
            return field_object[0]

        return field_object.pk

StarkHandler类新增函数

   search_group = []

    def get_search_group(self):
        return self.search_group

    def get_search_group_condition(self, request):
        """
        获取组合搜索的条件
        :param request:
        :return:
        """
        condition = {}
        # ?depart=1&gender=2&page=123&q=999
        for option in self.get_search_group():
            if option.is_multi:
                values_list = request.GET.getlist(option.field)  # tags=[1,2]
                if not values_list:
                    continue
                condition['%s__in' % option.field] = values_list
            else:
                value = request.GET.get(option.field)  # tags=[1,2]
                if not value:
                    continue
                condition[option.field] = value
        return condition

前端模板changelist.html新增筛选功能

        {% if search_group_row_list %}
            <div class="panel panel-default">
                <div class="panel-heading">
                    <i class="fa fa-filter" aria-hidden="true"></i> 快速筛选
                </div>
                <div class="panel-body">
                    <div class="search-group">
                        {% for row in search_group_row_list %}
                            <div class="row">
                                {% for obj in row %}
                                    {{ obj|safe }}
                                {% endfor %}
                            </div>
                        {% endfor %}
                    </div>
                </div>
            </div>
        {% endif %}

标签：day28,self,value,field,dict,stark,组件,query,option
来源： https://www.cnblogs.com/simon1993/p/15942303.html