I. Introduction
First of all, the overall development idea is: For example, a front-end developer A and a back-end developer B will jointly debug a function of [query user data], and then the front-end developer A will be responsible for the development of [page for querying user data]. Back-end developer B is responsible for the development of the [interface for querying user data] and after the development is completed and the self-test is passed, it is provided to front-end developer A for joint debugging.
We need to know that the prerequisite for front-end developer A and back-end developer B to develop this function together is to strictly develop requirements documents and prototype diagrams written by product personnel.
Therefore, in the actual development process, the front-end developer A will require the return value of the [query user data interface] provided by the back-end developer to meet these two points:
⑴. All fields and field value information required by front-end developer A must be returned, because front-end developers can get these data to conduct self-test to ensure that the data is not missed;
⑵. The data structure of each field value must meet the requirements of front-end developer A, because front-end developer A will get such field values directly to do related processing without the need to perform secondary processing on the data structure of field values. Improving the development efficiency of front-end developer A can also improve the efficiency of data loading.
detail:
①. In the django framework, the interface is actually a view function, but the name is inconsistent.
②. The follow-up involved front-end and back-end interface joint debugging process can basically be carried out according to this idea.
2. Carry out an actual complete process operation
2.1. The first step: write a view function for querying user data
def search_person(request):
# 进行实际的一个完整流程操作
try:
res = Person.objects.all().values()
res = list(res)
except:
raise ("查询语句执行过程中出现报错信息，程序终止执行！")
# 初始化一个空dict，用于存储要返回给起前端页面的所有字段和对应字段值，且字段对应字典的key，字段值对应字典的value；
data = {}
if len(res) != 0:
# 第一步：把数据表的相关数据都存储在这个key【result】
data["result"] = res
# 第二步：把状态码200的值存储在这个key【code】
data["code"] = 200
# 第三步：把状态success的值存储在这个key【success】
data["success"] = True
# 第四步：把信息的值存储在这个key【msg】
data["msg"] = "获取数据成功！"
else:
data["result"] = res
data["code"] = 100
data["success"] = False
data["msg"] = "获取不到数据"
return JsonResponse(data, json_dumps_params={"ensure_ascii": False})
2.2. Step 2: Write a corresponding URL matching rule
detail:
①. The url matching rules have been configured before, and the corresponding content can be found in the previous blog posts. I will not continue to write them again in this blog;
2.3. The third step: start the django project [helloworld] service
2.4. Step 4: Visit the url address [ http://127.0.0.1:8000/search_person ] through any browser to view the display data
2.5. Step 5: Copy the return value of the interface to [ https://www.json.cn/ ] for online analysis and formatting of json data, which is convenient and intuitive to view the data
{
"result":[
{
"id":1,
"name":"杨见文",
"age":25
},
{
"id":2,
"name":"廖旺良",
"age":26
},
{
"id":3,
"name":"王凯",
"age":28
},
{
"id":4,
"name":"陈凯",
"age":28
}
],
"code":200,
"success":true,
"msg":"获取数据成功！"
}