Django Book Management System 3

Add the author's additions and deletions to search

One, add data table

Add a class in the models file below the App01 file

class Author (models. Model):    = models. Autofield (primary_key=True)    = models. Charfield (max_length=32)    Books= models. Manytomanyfield (to='book')

Perform

1. Python manage.py makemigrations--and find a little laptop to record models.py's changes.

2. Python manage.py Migrate---translate the above change records into SQL statements, go to database execution

Second, add the route

　　

URL (r ' ^author_list/$ ', views.author_list),
URL (r ' ^add_author/$ ', Views.add_author),
URL (r ' ^del_author/$ ', Views.del_author),
URL (r ' ^edit_author/$ ', Views.edit_author),

#上传功能
URL (r ' ^upload/$ ', views.upload),

Third, add the corresponding function

1. Functions of the author's display list

def author_list (Request):     # 2. Get the ORM object    for the author Author_obj_list = Author.objects.all ()    # Returns a author page table     return Render (Request,'author_list.html', {'author_obj_list ': author_obj_list})   # Show All the authors and books

2. Add the Author function

defAdd_author (Request):#2. Show all the books to the user    #get all the booksBook_obj_list =Book.objects.all ()#Post When a user submits a request    ifRequest.method = ='POST': Add_author_name= Request. Post.get ('author_name')#get the author's nameAdd_book_ids = Request. Post.getlist ('Book_ids')#get the book written by the author (be sure to use getlist or you can only get the last book)        #A = Author.objects.create (name=add_author_name)        #A.books.set (add_book_ids)Author.objects.create (Name=add_author_name). Books.set (Add_book_ids)#using ORM to write data into a database table        returnredirect'/author_list/')    #1. First time to return a page for a user    returnRender (Request,'add_author.html',{'book_obj_list': Book_obj_list})

3. Delete Author functions

def Del_author (Request):     # get the ID    of the deleted object del_author_id = Request. Get.get ('ID')    # Delete data    from SQL table Author.objects.get (id=del_author_id). Delete ()    #  jump back to author_lsit face page    return Redirect ('/author_list/')

4. Editing author functions

defEdit_author (Request):#1. Get the ID you want to edit firstedit_id = Request. Get.get ('ID')#get the ID you want to edit for the first timeAuthor_obj = Author.objects.get (id=edit_id)#get an Orm object to edit the author of the table    ifRequest.method = ='POST': Edit_author_name= Request. Post.get ('author_name') Edit_book_ids= Request. Post.getlist ('Book_obj_ids')#Get the dataAuthor_obj.name= Edit_author_name#Modify AuthorAuthor_obj.save ()#Change your watch to save it.Author_obj.books.set (edit_book_ids)#Modify the third contact form        returnredirect'/author_list/')    #returns an HTML page for the first time    #need the corresponding author, titleBook_obj_list =Book.objects.all ()returnRender (Request,'edit_author.html',{'book_obj_list': Book_obj_list,'Author_obj': Author_obj})

5. Upload function

defUpload (Request):ifRequest.method = ='POST':#Submit Form PostFile_obj = Request. Files.get ('name')#get File Object        Print(file_obj) file_name=File_obj.namePrint(file_name)ifos.path.exists (Os.path.join (settings. Base_dir,file_name)):#Parse OS.path.exists path exists as true, does not exist not false, file name stitching project path            #add up is the project path under the other side of the existence and my file name fileName,suffix = File_name.split ('.') name+='1'file_name= name +'.'+suffix with open (file_name,'WB') as F: forChunkinchfile_obj.chunks (): F.write (chunk)#give the user an interface for the first time    returnRender (Request,'upload.html')

Django Book Management System 3