【发布时间】：2017-08-13 14:41:35
【问题描述】：
我在 django 模板中迭代 JSON 时遇到问题。
我的 JOSN 看起来像，
{
"main_cats": [
{
"pk": 1,
"model": "BeeForms.maincategory",
"fields": {
"is_visible": true,
"name": "Test Main",
"order_by_asc": true,
"base_category": 1,
"help_text": "",
"is_seller_field": false,
"position": 10,
"show_seller": true,
"order_by_type": true
}
}
],
"sub_cats": [
{
"pk": 15,
"model": "BeeForms.subcategory",
"fields": {
"regex": "[0-9a-zA-Z]",
"library_id": "TextBox",
"input_length": 255,
"name": "TextBox",
"order_by_asc": false,
"field_type": "text",
"main_category": 1,
"is_active": true,
"is_visible": true,
"help_text": "",
"position": 10,
"is_required": true,
"field_display_type": "input",
"order_by_type": true,
"has_enumerations": false
}
},
{
"pk": 16,
"model": "BeeForms.subcategory",
"fields": {
"regex": "[A-Za-z0-9]",
"library_id": "SelectBox",
"input_length": 255,
"name": "SelectBox",
"order_by_asc": false,
"field_type": "",
"main_category": 1,
"is_active": true,
"is_visible": true,
"help_text": "",
"position": 10,
"is_required": false,
"field_display_type": "select",
"order_by_type": true,
"has_enumerations": true
}
},
{
"pk": 18,
"model": "BeeForms.subcategory",
"fields": {
"regex": "[0-9a-zA-Z]",
"library_id": "TextArea",
"input_length": 255,
"name": "TextArea",
"order_by_asc": false,
"field_type": "varchar",
"main_category": 1,
"is_active": true,
"is_visible": true,
"help_text": "",
"position": 10,
"is_required": false,
"field_display_type": "textarea",
"order_by_type": true,
"has_enumerations": false
}
},
{
"pk": 22,
"model": "BeeForms.subcategory",
"fields": {
"regex": "[A-Za-z0-9]",
"library_id": "Checkbox",
"input_length": 255,
"name": "Checkbox",
"order_by_asc": false,
"field_type": "",
"main_category": 1,
"is_active": true,
"is_visible": true,
"help_text": "",
"position": 10,
"is_required": false,
"field_display_type": "checkbox",
"order_by_type": true,
"has_enumerations": true
}
}
],
"base_cats": [
{
"pk": 1,
"model": "BeeForms.basecategory",
"fields": {
"form_type": 1,
"position": 10,
"order_by_asc": true,
"name": "Sales Information",
"order_by_type": true
}
},
{
"pk": 2,
"model": "BeeForms.basecategory",
"fields": {
"form_type": 1,
"position": 20,
"order_by_asc": true,
"name": "Listing information",
"order_by_type": true
}
},
{
"pk": 3,
"model": "BeeForms.basecategory",
"fields": {
"form_type": 1,
"position": 30,
"order_by_asc": true,
"name": "Land & Tax",
"order_by_type": true
}
},
{
"pk": 4,
"model": "BeeForms.basecategory",
"fields": {
"form_type": 1,
"position": 40,
"order_by_asc": true,
"name": "Exterior Construction",
"order_by_type": true
}
},
{
"pk": 5,
"model": "BeeForms.basecategory",
"fields": {
"form_type": 1,
"position": 50,
"order_by_asc": true,
"name": "Interior/Utilities",
"order_by_type": true
}
},
{
"pk": 6,
"model": "BeeForms.basecategory",
"fields": {
"form_type": 1,
"position": 60,
"order_by_asc": true,
"name": "HOA/Community",
"order_by_type": true
}
},
{
"pk": 7,
"model": "BeeForms.basecategory",
"fields": {
"form_type": 1,
"position": 70,
"order_by_asc": true,
"name": "Remarks",
"order_by_type": true
}
}
],
"enum_content": [
{
"pk": 58,
"model": "BeeForms.enumerationcontent",
"fields": {
"library_id": "SelectYesA1",
"name": "SelectYesA1",
"order_by_asc": false,
"is_visible": true,
"is_active": true,
"enum_type_category": 53,
"position": 10,
"order_by_type": true
}
},
{
"pk": 59,
"model": "BeeForms.enumerationcontent",
"fields": {
"library_id": "SelectNoA1",
"name": "SelectNoA1",
"order_by_asc": false,
"is_visible": true,
"is_active": true,
"enum_type_category": 53,
"position": 10,
"order_by_type": true
}
},
{
"pk": 60,
"model": "BeeForms.enumerationcontent",
"fields": {
"library_id": "SelectCheckBoxYes",
"name": "SelectCheckBoxYes",
"order_by_asc": false,
"is_visible": true,
"is_active": true,
"enum_type_category": 54,
"position": 10,
"order_by_type": true
}
},
{
"pk": 61,
"model": "BeeForms.enumerationcontent",
"fields": {
"library_id": "SelectCheckBoxNo",
"name": "SelectCheckBoxNo",
"order_by_asc": false,
"is_visible": true,
"is_active": true,
"enum_type_category": 54,
"position": 10,
"order_by_type": true
}
}
],
"enums": [
{
"pk": 20,
"model": "BeeForms.enumerations",
"fields": {
"library_id": "SelectYes",
"name": "SelectYes",
"order_by_asc": false,
"is_visible": true,
"has_type": true,
"is_active": true,
"position": 10,
"order_by_type": true,
"sub_category": 16
}
},
{
"pk": 21,
"model": "BeeForms.enumerations",
"fields": {
"library_id": "SelectNo",
"name": "SelectNo",
"order_by_asc": false,
"is_visible": true,
"has_type": true,
"is_active": true,
"position": 10,
"order_by_type": true,
"sub_category": 16
}
},
{
"pk": 30,
"model": "BeeForms.enumerations",
"fields": {
"library_id": "Yes",
"name": "Yes",
"order_by_asc": false,
"is_visible": true,
"has_type": true,
"is_active": true,
"position": 10,
"order_by_type": true,
"sub_category": 22
}
},
{
"pk": 31,
"model": "BeeForms.enumerations",
"fields": {
"library_id": "No",
"name": "No",
"order_by_asc": false,
"is_visible": true,
"has_type": false,
"is_active": true,
"position": 10,
"order_by_type": true,
"sub_category": 22
}
}
],
"enum_types": [
{
"pk": 53,
"model": "BeeForms.enumerationtype",
"fields": {
"regex": "[A-Za-z0-9]",
"is_visible": true,
"name": "SelectYesA",
"library_id": "SelectYesA",
"field_type": "",
"is_active": true,
"has_content": true,
"enum_category": 20,
"field_display_type": "select",
"input_length": 255
}
},
{
"pk": 54,
"model": "BeeForms.enumerationtype",
"fields": {
"regex": "[A-Za-z0-9]",
"is_visible": true,
"name": "",
"library_id": "",
"field_type": "",
"is_active": true,
"has_content": true,
"enum_category": 21,
"field_display_type": "checkbox",
"input_length": 255
}
}
]
}
我用来创建json文件的代码如下。
def serialize(self, instance_name, form, destination):
""" Seralizes the information passed in."""
# we need to make sure that the directory is real.
if not os.path.exists(destination):
os.makedirs(destination)
# Lets grab all the information needed and serailize it all at the same time.
base_cats = serializers.serialize('json', BaseCategory.objects.all().filter(form_type_id=form.id).order_by('id'))
main_cats = serializers.serialize('json', MainCategory.objects.all().order_by('id'))
sub_cats = serializers.serialize('json', SubCategory.objects.all().order_by('id'))
enums = serializers.serialize('json', Enumerations.objects.all().order_by('id'))
enum_types = serializers.serialize('json', EnumerationType.objects.all().order_by('id'))
enum_content = serializers.serialize('json', EnumerationContent.objects.all().order_by('id'))
# now that they are all serailized make it into a list of simplejson
base_list = simplejson.loads(base_cats)
main_list = simplejson.loads(main_cats)
sub_list = simplejson.loads(sub_cats)
enums_list = simplejson.loads(enums)
enum_type_list = simplejson.loads(enum_types)
enum_content_list = simplejson.loads(enum_content)
# now we combine them all together...
self.json_data = simplejson.dumps({'base_cats': base_list, 'main_cats': main_list, 'sub_cats': sub_list,
'enums': enums_list, 'enum_types': enum_type_list,
'enum_content': enum_content_list}, indent=4)
print(self.json_data)
# now that we combined them into json_data. Lets write it out to a file.
with open(destination + instance_name + '.json', 'w') as json_write:
json_write.write(self.json_data)
我使用以下内容将 JSON 加载到 Python 对象中。
with open(instance_location + '.json', 'r') as json_read:
self.json_data = json_read.read()
# now lets take the data and load into json array
data = simplejson.loads(self.json_data)
# now lets grab each list.
base_cats = data['base_cats']
main_cats = data['main_cats']
sub_cats = data['sub_cats']
enums = data['enums']
enum_types = data['enum_types']
enum_content = data['enum_content']
# lets return it all!
return base_cats, main_cats, sub_cats, enums, enum_types, enum_content
在直接的 Python 中，我可以遍历（例如 base_cats）并通过以下 for 循环获取我需要的信息
for base in base_dict:
print base['pk']
print base['fields']['name']
当我在 django 模板中尝试 for 循环时，出现以下错误：
无法解析余数：'['pk']' from 'base['pk']'
随着 JSON 的结构化方式，我将如何在 django 模板中循环遍历它，因为以下内容不起作用。
{% for base in base_cats %}
{{ base['pk'] }}
{% endfor %}
【问题讨论】：
标签： python json django django-models django-templates