django_myshop/apps/goods/forms.py

from django import forms
from django.core.exceptions import ValidationError

from apps.goods.models import *
from apps.goods.views import *


class GoodsCateForm(forms.Form):
    name = forms.CharField(label='分类名称', min_length=2, widget=forms.widgets.TextInput(
        attrs={'class': 'form-control', 'placeholder': '请输入分类名称'}),
                           error_messages={'required': '分类名称不能为空！', 'min_length': '长度最小2位'})
    parent_id = forms.CharField(label='选择父类', max_length=20, required=False,
                                widget=forms.widgets.Select(
                                    attrs={'class': 'form-control custom-select', 'placeholder': '选择父类'}),
                                error_messages={'required': '请选择父类'})
    sort = forms.CharField(label='排序', widget=forms.widgets.TextInput(
        attrs={'class': 'form-control', 'placeholder': '请输入数字'}), error_messages={'required': '排序不能为空'})
    logo = forms.ImageField(label='分类图片', required=False,
                            widget=forms.widgets.FileInput(attrs={'class': 'custom-file-input'}))

    def __init__(self, *args, **kwargs):
        super(GoodsCateForm, self).__init__(*args, **kwargs)
        cate_all = GoodsCategory.objects.all()
        self.alist = [('', '请选择...')]
        self.fields['parent_id'].widget.choices = self.bind_data(cate_all, 0, 1)

    def bind_data(self, datas_all, _id, n):
        if _id == 0:
            print(111111111111)
            datas = datas_all.filter(parent__isnull=True)
            print(datas)
        else:
            print(222222222222)
            datas = datas_all.filter(parent_id=_id)
            print(datas)
        for data in datas:
            print(data)
            self.alist.append((data.id, self.space_length(n) + data.name))

            self.bind_data(datas_all, data.id, n+2)
            print(self.alist)
        return self.alist

    @staticmethod
    def space_length(i):
        space = ''
        for j in range(1, i):
            space += '--'
        return space + '|--'