From 7318610ccd0f8d50468ee52641081ebf4ff69451 Mon Sep 17 00:00:00 2001
From: caihaocheng <8535954+caihaocheng@user.noreply.gitee.com>
Date: Tue, 5 Jan 2021 19:02:32 +0800
Subject: [PATCH 01/12] 1
---
library_app/selfFunc.py | 85 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 85 insertions(+)
create mode 100644 library_app/selfFunc.py
diff --git a/library_app/selfFunc.py b/library_app/selfFunc.py
new file mode 100644
index 0000000..d308ca5
--- /dev/null
+++ b/library_app/selfFunc.py
@@ -0,0 +1,85 @@
+#return the Book queryset object
+def getBookObject(bookClass):
+ return bookClass.queryset
+
+##return the author queryset object
+def getAuthorObject(authorClass):
+ return authorClass.queryset
+
+#return the category queryset object
+def getCategoryObject(categoryClass):
+ return categoryClass.queryset
+
+#use the build-in function to count the number of return object directly
+def countBook(bookObject):
+ """
+ input: the book queryset object
+ return: number of book
+ """
+ return bookObject.count()
+
+def totalValue(bookObject):
+ """
+ input: the book queryset object
+ output: the total value of book
+ """
+ #get the book's price list
+ valueList = bookObject.values('price')
+ #initialize
+ value = 0
+ #traverse the price list and sum up
+ for i in range(len(valueList)):
+ value += valueList[i]['price']
+ return value
+
+#get the authod whose number of book is the most
+def authorMostbook(bookObject, authorObject):
+ """
+ input: book queryset object, author queryset object
+ output: author name and number of book
+ """
+ #use a dict to store the infor, key is author id, value is the count of frequency of author id
+ countDict = {}
+ #the author list of book
+ bookList = bookObject.values('author')
+ #traverse the list
+ #if the author is not in dict, add it into dict and set the value as 1
+ #if the author is already in dict, get the value and add 1
+ for i in range(len(bookList)):
+ if(bookList[i]['author'] not in countDict):
+ countDict[bookList[i]['author']] = 1
+ else:
+ count = countDict[bookList[i]['author']]
+ countDict[bookList[i]['author']] = count + 1
+ #zip the keys list and values list
+ #use max() to get the biggest value and the corresponding author id
+ key, value = max(zip(countDict.keys(),countDict.values()))
+ #get the author name according to the id
+ authorName = authorObject.values().filter(id=key)[0]['name']
+ return authorName, value
+
+def categoryMostBook(bookObject, categoryObject):
+ """
+ input: book queryset object, catrgory queryset object
+ output: category title and the number of book in that category
+ """
+ #use dict to store the infor
+ countDict = {}
+ #get the list of category id from book queryset object
+ bookList = bookObject.values('category_id')
+ #traverse the list
+ #if the category id is not in dict, add it into dict and set the value as 1
+ #if the category id is already in dict, get the value and add 1
+ for i in range(len(bookList)):
+ if(bookList[i]['category_id'] not in countDict):
+ countDict[bookList[i]['category_id']] = 1
+ else:
+ count = countDict[bookList[i]['category_id']]
+ countDict[bookList[i]['category_id']] = count + 1
+ #zip the keys list and values list
+ #use max() to get the biggest value and the corresponding category id
+ key, value = max(zip(countDict.keys(),countDict.values()))
+ #get the category name
+ category = categoryObject.values().filter(id=key)[0]['title']
+
+ return category, value
\ No newline at end of file
--
Gitee
From 973cf3e8628f8d1174c36a371bcddb9037e044db Mon Sep 17 00:00:00 2001
From: caihaocheng <8535954+caihaocheng@user.noreply.gitee.com>
Date: Tue, 5 Jan 2021 19:02:57 +0800
Subject: [PATCH 02/12] =?UTF-8?q?=E5=88=A0=E9=99=A4=E6=96=87=E4=BB=B6=20li?=
=?UTF-8?q?brary=5Fapp/views.py?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
---
library_app/views.py | 23 -----------------------
1 file changed, 23 deletions(-)
delete mode 100644 library_app/views.py
diff --git a/library_app/views.py b/library_app/views.py
deleted file mode 100644
index da56ab7..0000000
--- a/library_app/views.py
+++ /dev/null
@@ -1,23 +0,0 @@
-from rest_framework import viewsets
-
-from library_app.models import Category, Author, Book
-from library_app.serializers import CategorySerializer, AuthorSerializer, BookReadSerializer, BookWriteSerializer
-
-
-class BookViewSet(viewsets.ModelViewSet):
- queryset = Book.objects.all()
-
- def get_serializer_class(self):
- if self.request.method in ['GET', 'HEAD']:
- return BookReadSerializer
- else:
- return BookWriteSerializer
-
-class CategoryViewSet(viewsets.ModelViewSet):
- queryset = Category.objects.all()
- serializer_class = CategorySerializer
-
-
-class AuthorViewSet(viewsets.ModelViewSet):
- queryset = Author.objects.all()
- serializer_class = AuthorSerializer
--
Gitee
From 78957797bcd44516af792bb6c7caf19feb176bd4 Mon Sep 17 00:00:00 2001
From: caihaocheng <8535954+caihaocheng@user.noreply.gitee.com>
Date: Tue, 5 Jan 2021 19:03:21 +0800
Subject: [PATCH 03/12] 2
---
library_app/urls.py | 7 ++++++
library_app/views.py | 55 ++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 62 insertions(+)
create mode 100644 library_app/urls.py
create mode 100644 library_app/views.py
diff --git a/library_app/urls.py b/library_app/urls.py
new file mode 100644
index 0000000..3ef24d9
--- /dev/null
+++ b/library_app/urls.py
@@ -0,0 +1,7 @@
+from django.urls import path
+
+from . import views
+
+urlpatterns = [
+ path('', views.index, name='index'),
+]
\ No newline at end of file
diff --git a/library_app/views.py b/library_app/views.py
new file mode 100644
index 0000000..f6d634c
--- /dev/null
+++ b/library_app/views.py
@@ -0,0 +1,55 @@
+from rest_framework import viewsets
+
+from library_app.models import Category, Author, Book
+from library_app.serializers import CategorySerializer, AuthorSerializer, BookReadSerializer, BookWriteSerializer
+from django.http import HttpResponse
+from django.shortcuts import render
+
+from .selfFunc import *
+
+class BookViewSet(viewsets.ModelViewSet):
+ queryset = Book.objects.all()
+ def get_serializer_class(self):
+ if self.request.method in ['GET', 'HEAD']:
+ return BookReadSerializer
+ else:
+ return BookWriteSerializer
+
+class CategoryViewSet(viewsets.ModelViewSet):
+ queryset = Category.objects.all()
+ serializer_class = CategorySerializer
+
+
+class AuthorViewSet(viewsets.ModelViewSet):
+ queryset = Author.objects.all()
+ serializer_class = AuthorSerializer
+
+def index(request):
+ """
+ go to the site: http://localhost:8000/library_app/
+ ALL the function are implemented in the doc selfFunc.py
+ """
+ book = BookViewSet()
+ bookObject = getBookObject(book)
+
+ author = AuthorViewSet()
+ authorObject = getAuthorObject(author)
+
+ category = CategoryViewSet
+ categoryObject = getCategoryObject(category)
+
+ #number of book
+ numBook = countBook(bookObject)
+ #value:
+ value = totalValue(bookObject)
+ #author with most book
+ author, count = authorMostbook(bookObject, authorObject)
+ #category with most book
+ category, countCategory = categoryMostBook(bookObject, categoryObject)
+
+
+
+
+ result = {'numBook': numBook, 'value': value, 'author': author, 'count': count,
+ 'category': category, "countCategory": countCategory}
+ return render(request,'library_app/index.html', result)
\ No newline at end of file
--
Gitee
From 6854f32d239d1b00d1d7f8943795cc76b9d94357 Mon Sep 17 00:00:00 2001
From: caihaocheng <8535954+caihaocheng@user.noreply.gitee.com>
Date: Tue, 5 Jan 2021 19:03:39 +0800
Subject: [PATCH 04/12] =?UTF-8?q?=E6=96=B0=E5=BB=BA=20templates?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
---
library_app/templates/.keep | 0
1 file changed, 0 insertions(+), 0 deletions(-)
create mode 100644 library_app/templates/.keep
diff --git a/library_app/templates/.keep b/library_app/templates/.keep
new file mode 100644
index 0000000..e69de29
--
Gitee
From bcda1c37c55e03903bcca49255958a8ba2d04e44 Mon Sep 17 00:00:00 2001
From: caihaocheng <8535954+caihaocheng@user.noreply.gitee.com>
Date: Tue, 5 Jan 2021 19:04:13 +0800
Subject: [PATCH 05/12] =?UTF-8?q?=E6=96=B0=E5=BB=BA=20library=5Fapp?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
---
library_app/templates/library_app/.keep | 0
1 file changed, 0 insertions(+), 0 deletions(-)
create mode 100644 library_app/templates/library_app/.keep
diff --git a/library_app/templates/library_app/.keep b/library_app/templates/library_app/.keep
new file mode 100644
index 0000000..e69de29
--
Gitee
From ac42b0eae335c482df3c2ff3fa48946b61f09613 Mon Sep 17 00:00:00 2001
From: caihaocheng <8535954+caihaocheng@user.noreply.gitee.com>
Date: Tue, 5 Jan 2021 19:04:30 +0800
Subject: [PATCH 06/12] 3
---
library_app/templates/library_app/index.html | 4 ++++
1 file changed, 4 insertions(+)
create mode 100644 library_app/templates/library_app/index.html
diff --git a/library_app/templates/library_app/index.html b/library_app/templates/library_app/index.html
new file mode 100644
index 0000000..9061f5a
--- /dev/null
+++ b/library_app/templates/library_app/index.html
@@ -0,0 +1,4 @@
+Number of book: {{ numBook|safe }}
+Total cost of all Book: {{ value|safe }}
+The author {{author|safe}} has the most number of book of {{count|safe}}
+The category {{category|safe}} has the most number of book of {{countCategory|safe}}
--
Gitee
From c280542ca7d2f724512898894857f056b5088386 Mon Sep 17 00:00:00 2001
From: caihaocheng <8535954+caihaocheng@user.noreply.gitee.com>
Date: Tue, 5 Jan 2021 19:05:35 +0800
Subject: [PATCH 07/12] =?UTF-8?q?=E5=88=A0=E9=99=A4=E6=96=87=E4=BB=B6=20dj?=
=?UTF-8?q?ango=5Frest=5Fsample/urls.py?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
---
django_rest_sample/urls.py | 30 ------------------------------
1 file changed, 30 deletions(-)
delete mode 100644 django_rest_sample/urls.py
diff --git a/django_rest_sample/urls.py b/django_rest_sample/urls.py
deleted file mode 100644
index 05fb841..0000000
--- a/django_rest_sample/urls.py
+++ /dev/null
@@ -1,30 +0,0 @@
-"""django_rest_sample URL Configuration
-
-The `urlpatterns` list routes URLs to views. For more information please see:
- https://docs.djangoproject.com/en/2.0/topics/http/urls/
-Examples:
-Function views
- 1. Add an import: from my_app import views
- 2. Add a URL to urlpatterns: path('', views.home, name='home')
-Class-based views
- 1. Add an import: from other_app.views import Home
- 2. Add a URL to urlpatterns: path('', Home.as_view(), name='home')
-Including another URLconf
- 1. Import the include() function: from django.urls import include, path
- 2. Add a URL to urlpatterns: path('blog/', include('blog.urls'))
-"""
-from django.contrib import admin
-from django.urls import path
-from rest_framework import routers
-
-from library_app.views import BookViewSet, CategoryViewSet, AuthorViewSet
-
-router = routers.DefaultRouter()
-router.register(r'books', BookViewSet)
-router.register(r'categories', CategoryViewSet)
-router.register(r'authors', AuthorViewSet)
-urlpatterns = router.urls
-
-urlpatterns += [
- path('admin/', admin.site.urls),
-]
--
Gitee
From 86c343c7297a71a807c3c3a4a64881d457954c86 Mon Sep 17 00:00:00 2001
From: caihaocheng <8535954+caihaocheng@user.noreply.gitee.com>
Date: Tue, 5 Jan 2021 19:05:44 +0800
Subject: [PATCH 08/12] 4
---
django_rest_sample/urls.py | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
create mode 100644 django_rest_sample/urls.py
diff --git a/django_rest_sample/urls.py b/django_rest_sample/urls.py
new file mode 100644
index 0000000..606b351
--- /dev/null
+++ b/django_rest_sample/urls.py
@@ -0,0 +1,32 @@
+"""django_rest_sample URL Configuration
+
+The `urlpatterns` list routes URLs to views. For more information please see:
+ https://docs.djangoproject.com/en/2.0/topics/http/urls/
+Examples:
+Function views
+ 1. Add an import: from my_app import views
+ 2. Add a URL to urlpatterns: path('', views.home, name='home')
+Class-based views
+ 1. Add an import: from other_app.views import Home
+ 2. Add a URL to urlpatterns: path('', Home.as_view(), name='home')
+Including another URLconf
+ 1. Import the include() function: from django.urls import include, path
+ 2. Add a URL to urlpatterns: path('blog/', include('blog.urls'))
+"""
+from django.contrib import admin
+from django.urls import path
+from rest_framework import routers
+from django.urls import include, path
+
+from library_app.views import BookViewSet, CategoryViewSet, AuthorViewSet
+
+router = routers.DefaultRouter()
+router.register(r'books', BookViewSet)
+router.register(r'categories', CategoryViewSet)
+router.register(r'authors', AuthorViewSet)
+urlpatterns = router.urls
+
+urlpatterns += [
+ path('library_app/', include('library_app.urls')),
+ path('admin/', admin.site.urls),
+]
--
Gitee
From 915ed8d08e4a9a52bc91b81a53005d0ad312dd3e Mon Sep 17 00:00:00 2001
From: caihaocheng <8535954+caihaocheng@user.noreply.gitee.com>
Date: Tue, 5 Jan 2021 19:07:36 +0800
Subject: [PATCH 09/12] =?UTF-8?q?=E5=88=A0=E9=99=A4=E6=96=87=E4=BB=B6=20li?=
=?UTF-8?q?brary=5Fapp/serializers.py?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
---
library_app/serializers.py | 28 ----------------------------
1 file changed, 28 deletions(-)
delete mode 100644 library_app/serializers.py
diff --git a/library_app/serializers.py b/library_app/serializers.py
deleted file mode 100644
index 849aea1..0000000
--- a/library_app/serializers.py
+++ /dev/null
@@ -1,28 +0,0 @@
-from rest_framework import serializers
-
-from library_app.models import Category, Book, Author
-
-
-
-class AuthorSerializer(serializers.ModelSerializer):
- class Meta:
- model = Author
- fields = "__all__"
-
-class BookReadSerializer(serializers.ModelSerializer):
- category = CategorySerializer()
- author = AuthorSerializer()
-
- class Meta:
- model = Book
- fields = '__all__'
-
-class BookWriteSerializer(serializers.ModelSerializer):
- class Meta:
- model = Book
- fields = "__all__"
-
-class CategorySerializer(serializers.ModelSerializer):
- class Meta:
- model = Category
- fields = "__all__"
--
Gitee
From 43fec7b92db6f74c3e3087e363f4c69aa7e6f4a0 Mon Sep 17 00:00:00 2001
From: caihaocheng <8535954+caihaocheng@user.noreply.gitee.com>
Date: Tue, 5 Jan 2021 19:07:51 +0800
Subject: [PATCH 10/12] 5
---
library_app/serializers.py | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
create mode 100644 library_app/serializers.py
diff --git a/library_app/serializers.py b/library_app/serializers.py
new file mode 100644
index 0000000..9b79f72
--- /dev/null
+++ b/library_app/serializers.py
@@ -0,0 +1,30 @@
+from rest_framework import serializers
+
+from library_app.models import Category, Book, Author
+
+
+
+class AuthorSerializer(serializers.ModelSerializer):
+ class Meta:
+ model = Author
+ fields = "__all__"
+
+class CategorySerializer(serializers.ModelSerializer):
+ class Meta:
+ model = Category
+ fields = "__all__"
+
+
+class BookReadSerializer(serializers.ModelSerializer):
+ category = CategorySerializer()
+ author = AuthorSerializer()
+
+ class Meta:
+ model = Book
+ fields = '__all__'
+
+class BookWriteSerializer(serializers.ModelSerializer):
+ class Meta:
+ model = Book
+ fields = "__all__"
+
--
Gitee
From b1bf93178f3e4f97083014d1e134e9693ae8e2e6 Mon Sep 17 00:00:00 2001
From: caihaocheng <8535954+caihaocheng@user.noreply.gitee.com>
Date: Tue, 5 Jan 2021 20:38:46 +0800
Subject: [PATCH 11/12] =?UTF-8?q?add=20=E5=BC=80=E5=8F=91=E7=AC=94?=
=?UTF-8?q?=E8=AE=B0.md.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
---
"\345\274\200\345\217\221\347\254\224\350\256\260.md" | 0
1 file changed, 0 insertions(+), 0 deletions(-)
create mode 100644 "\345\274\200\345\217\221\347\254\224\350\256\260.md"
diff --git "a/\345\274\200\345\217\221\347\254\224\350\256\260.md" "b/\345\274\200\345\217\221\347\254\224\350\256\260.md"
new file mode 100644
index 0000000..e69de29
--
Gitee
From 538754019a2e673125603893fdcae475da899d86 Mon Sep 17 00:00:00 2001
From: caihaocheng <8535954+caihaocheng@user.noreply.gitee.com>
Date: Tue, 5 Jan 2021 21:01:23 +0800
Subject: [PATCH 12/12] =?UTF-8?q?update=20=E5=BC=80=E5=8F=91=E7=AC=94?=
=?UTF-8?q?=E8=AE=B0.md.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
---
...00\345\217\221\347\254\224\350\256\260.md" | 52 +++++++++++++++++++
1 file changed, 52 insertions(+)
diff --git "a/\345\274\200\345\217\221\347\254\224\350\256\260.md" "b/\345\274\200\345\217\221\347\254\224\350\256\260.md"
index e69de29..acfd112 100644
--- "a/\345\274\200\345\217\221\347\254\224\350\256\260.md"
+++ "b/\345\274\200\345\217\221\347\254\224\350\256\260.md"
@@ -0,0 +1,52 @@
+所用方法都在文件selfFunc.py 中实现
+ 1. Total number of books owned.
+首先获取Book object,
+
+```
+book = BookViewSet()
+bookObject = getBookObject(book)
+```
+然后对bookObject调用function countBook(bookObject)以获取总的书本数量；其实现方法为对bookObject调用内置函数count()，直接输出书的数量。
+
+ 2. Total cost of all books.
+获取bookObject中说有书的价格
+
+```
+valueList = bookObject.values('price')
+```
+然后对于valueList，用for循环将所有价格相加，然后输出。
+
+```
+value = 0
+#traverse the price list and sum up
+for i in range(len(valueList)):
+ value += valueList[i]['price']
+```
+ 3. Author with most books.
+思想：利用dict储存信息，遍历library中的所有书，如果遇到一个新的作者（作者id not in dict），建一个新的key，并将value设为1；如果作者已经在dict里（作者id in dict), 获取在字典中该作者的书的数量，并更新（dict[author id]）= value+1
+
+```
+for i in range(len(bookList)):
+ if(bookList[i]['author'] not in countDict):
+ countDict[bookList[i]['author']] = 1
+ else:
+ count = countDict[bookList[i]['author']]
+ countDict[bookList[i]['author']] = count + 1
+```
+然后获取字典中value最大的值和其对应的id
+获取id后，可以在authorObject中，通过filter(ID=id)获取作者名字
+
+ 4. Category with most books.
+思想：同 3. 相似。利用dict储存信息，遍历library中的所有书，如果遇到一个新的类别（category id not in dict），建一个新的key，并将value设为1；如果类别已经在dict里（category id in dict), 获取在字典中该类别的书的数量，并更新（dict[category id]）= value+1
+
+```
+ for i in range(len(bookList)):
+ if(bookList[i]['category_id'] not in countDict):
+ countDict[bookList[i]['category_id']] = 1
+ else:
+ count = countDict[bookList[i]['category_id']]
+ countDict[bookList[i]['category_id']] = count + 1
+```
+然后获取字典中value最大的值和其对应的id
+获取id后，可以在categoryObject中，通过filter(ID=id)获取作者名字
+
--
Gitee