Static configuration file
Brief introduction
What is a static file?
django project introduced by third-party packages, js, css, write their own js, css, save pictures and other relevant data
Why To configure a static file?
Browser html page to get through the path we import third-party libraries, initiated the request, django is open only for interface resources (url control), can request, our static files by default is not open request, a static configuration file is open to external files can access resources inside a folder, so that external direct access.
Configuration
1 of static default all files in the static folder
Put all the files in this folder
2 To configure the setting in
= STATICFILES_DIRS [
the os.path.join (base_dir, 'static'), can be placed inside # plurality of folders
]
note:
"" " 1 static folder is the default put everyone unified file static files folder names, open to all resources inside the external configuration setting, the request can be directly 2 setting in STATIC_URL = '/ static /' settings, provided that the external path prefix the html file set request packet of a third party, and regardless of the name of the file folder 1 3 setting the STATICFILES_DIRS = [os.path.join (bASE_DIR, ' static'], "static" indicates you static files file folder
4 STATICFILES_DIRS can put multiple static folder
"" "
Routing Control
In django of urls.py file
from django.contrib Import ADMIN from django.conf.urls Import URL from app01.views * # Import function introduced Application view the urlpatterns = [ URL ( ' ADMIN / ' , admin.site.urls), comes # Django admin the url ( ' the Test / ' , get_test), # own to write ]
note:
1 urlpatterns is a list of a plurality of values can be put
2 url is a function of the first parameter is a regular expression, is a view of the second parameter mapping function in views.py
3 plead browser url path to the final did not add "/", it will redirect to "/" in the url again made the request, so the request can not add "/"
View function
Written application views.py file
三板斧：render,HttpResponse,redirect
from django.shortcuts import render, HttpResponse, redirect
def get_test(requests):
if requests.method == "GET":
print(requests.GET)
name = requests.GET.get("name")
name1 = requests.GET.getlist("name")
print(name, name1)
return HttpResponse("GET")
elif requests.method == "POST":
name2 = requests.GET.get("name")
name3 = requests.GET.getlist("name")
print(name2, name3)
return HttpResponse("POST")
return HttpResponse("错误请求")
"" "
. 1 requests.method # request method for obtaining the front end request, GET, or the POST
2 requests.GET get request may acquire the data of the distal end <QueryDict: { 'name': [ 'Lynn', 'Egon']}>
. 3 can by dictionary value method, to obtain data requests.GET. the default value is the last value list
4 If you want to get all of the value list, with requests.GEt.getlist ( "name") method, will get a list of
5 POST request and get the same
"" "
note:
When the post data submitted, the browser will throw an exception:
The first comment out setting:
database
Based pymysql
views.py
from django.shortcuts import render, HttpResponse, redirect
import pymysql
def get_user_info(requests):
if requests.method == "GET":
return render(requests, "login.html")
elif requests.method == "POST":
conn = pymysql.connect(
host="132.232.98.201",
port=3306,
database="django_table",
user="root",
password="boonray",
charset="utf8",
autocommit=True
)# 连接数据库
name = requests.POST.get("name")
password = requests.POST.get("password")
cursor = conn.cursor(pymysql.cursors.DictCursor)
cursor.execute ( "select * from django_user where name =% s and password =% s", (name, password)) # sql statement execution
user_info = cursor.fetchall () # obtain execution results
if user_info: Verify whether data exists #
return HttpResponse ( "Login successful")
return HttpResponse ( "Bad request")
Based orm
django database connection
setting in the configuration
DATABASES = {
# 'Default': {
# 'ENGINE': 'django.db.backends.sqlite3', # default is a small database of the sqlite3
# 'NAME': the os.path.join (base_dir, 'db.sqlite3'),
} #
"default": {
'ENGINE': 'django.db.backends.mysql',
'NAME': "django_table",
"the USER": 'the root',
"PASSWORD": '123',
"the HOST": " 127.0.0.1 ",
" PORT ": 3306,
}
}
# Note: the dictionary key is all uppercase
__Init__ configuration file in the project or application files in the package
pymysql Import
pymysql.install_as_MySQLdb () # mysql_db replaced with a connection to the database pymysql
snake
Object-relational mapping, additions and deletions to achieve a simple data search table data change
Class 1 mapping database tables
2 is mapped to the attribute fields in the database
3 to an object map data in the database
models.py file
increase
models.py file
Models here Wallpaper the Create your #.
# User table
class DjangoUser (models.Model):
ID = models.IntegerField (primary_key = True)
name = models.CharField (MAX_LENGTH = 32)
password = models.CharField (MAX_LENGTH = 32)
class Meta -:
= named db_table, "django_user"
DEF __str __ (Self): # print target, the printing result of the name field value
return self.name
views.py
from django.shortcuts Import the render, the HttpResponse, the redirect from app01.models Import * DEF get_user_info (Requests): IF requests.method == " the POST " : name = requests.POST.get ( " name " ) password = requests.POST. GET ( " name " ) USER_OBJ = DjangoUser.objects.create (name = name, password = password) # save data to the database, the newly created data object will return # the User = DjangoUser (name = name, password = password) # The second way to save # user.save () # call the save method, saved to the database, there is no return value IF USER_OBJ: return HttpResponse ( " Registration Success " ) the else : return HttpResponse ( " registration failed " ) return the render (Requests, " login.html " )
delete
views.py
DELETE_USER DEF (Requests):
delete_id = requests.GET.get ( "delete_id")
DjangoUser.objects.filter (ID = delete_id) .Delete () # fixed usage table .objects .... filter () corresponds to sql where, screened
return HttpResponse ( "deleted successfully")
check
views.py
def get_user (requests):
All data # user_list = DjangoUser.objects.all () # query a database table, return QuerySet objects that can be indexed value
# user_list = DjangoUser.objects.filter () # filter added filter criteria , returns the QuerySet objects
# print (user.query) # object can perform query method, the object is to get the result of sql statement
user = DjangoUser.objects.filter (). first ( ) # The result is a data object
return render (requests, "login.html" , locals ()) # The third parameter must be a dictionary, locals are able to get all the variables of the current generate a dictionary
change
views.py
def update_user(requests): update_id = requests.POST.get("update_id") name = requests.POST.get("name") password = requests.POST.get("password") user_id = DjangoUser.objects.filter(id=update_id).update(name=name, password=password) if user_id: # 返回结果是修改数据的id return HttpResponse("修改成功")