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我傾斜Django和我用ForeignKey鏈接我的模型。 icontains在非ForeignKeys的字段中工作。查詢集引發:相關領域得到無效查找:icontains
我想過濾我的模型中的項目,只顯示與查詢集相匹配的字段。 但是queryset引發:相關領域得到無效查找:icontains
請幫助。下面是我的模型和視圖
我的模型
class Category(models.Model):
category = models.CharField(max_length=200, default='', blank=True, null=True)
def __unicode__(self):
return self.category
class StoreItems(models.Model):
item_name = models.CharField(max_length=200, default='', blank=True, null=True)
def __unicode__(self):
return self.item_name
class Supplier(models.Model):
supplier_name = models.CharField(max_length=200, default='', blank=True, null=True)
def __unicode__(self):
return self.supplier_name
class Unit(models.Model):
unit = models.CharField(max_length=200, default='', blank=True, null=True)
def __unicode__(self):
return self.unit
class Store(models.Model):
category = models.ForeignKey(Category, blank=True, null=True)
item_name = models.ForeignKey(StoreItems, blank=True, null=True)
quantity = models.IntegerField(default='', blank=True, null=False)
receive_amount = models.IntegerField(blank=True, null=True)
receive_by = models.CharField(max_length=120, default='', blank=True, null=False)
issue_amount = models.IntegerField(blank=True, null=True)
issue_by = models.CharField(max_length=120, default='', blank=True, null=True)
issue_to = models.CharField(max_length=120, default='', blank=True, null=True)
supplier_name = models.ForeignKey(Supplier, blank=True, null=True)
created_by = models.CharField(max_length=15, default='', blank=True, null=True)
unit = models.ForeignKey(Unit, blank=True, null=True)
reorder_level = models.IntegerField(default='0', blank=True, null=False)
export_to_CSV = models.BooleanField(default=False)
last_updated = models.DateTimeField(auto_now_add=False, auto_now=True)
我查看
def store_list(request):
label = 'STORE'
title = 'Select the item you want to filter'
heading = 'SEARCH ITEMS'
if request.user.is_authenticated():
form = StoreSearchForm(request.POST or None)
context = {
"title": title,
"form": form,
"heading": heading,
}
if request.method == 'POST':
queryset = Store.objects.all().order_by('item_name').filter(category__icontains=form['category'].value(), item_name__icontains=form['item_name'].value())
context = {
"queryset": queryset,
"form": form,
}
return render(request, "store.html", context)
你爲什麼要用'icontains'呢?正如你所說,category是一個ForeignKey,而你的表單正在返回一個實際的Category實例,而不是一個字符串 - 你想匹配實際的對象,而不是搜索包含匹配。 –
另外,這是什麼'form ['field'] .value()'?從字段獲取值的方式是form.cleaned_data ['field']'。 –