'更新了Django示例代码'

Day41-55/code/hellodjango/demo/admin.py

 from django.contrib import admin
 
-from demo.models import Teacher
+from demo.models import Teacher, Subject
+
+
+class SubjectAdmin(admin.ModelAdmin):
+    list_display = ('no', 'name', 'intro')
+    ordering = ('no', )
 
 
 class TeacherAdmin(admin.ModelAdmin):
-    list_display = ('no', 'name', 'job', 'intro', 'motto')
+    list_display = ('no', 'name', 'intro', 'motto', 'subject', 'manager')
     search_fields = ('name', 'intro')
     ordering = ('no', )
 
 
+admin.site.register(Subject, SubjectAdmin)
 admin.site.register(Teacher, TeacherAdmin)
+

Day41-55/code/hellodjango/demo/migrations/0001_initial.py

-# Generated by Django 2.0.6 on 2018-07-03 02:20
+# Generated by Django 2.0.6 on 2018-07-04 02:30
 
 from django.db import migrations, models
+import django.db.models.deletion
 
 
 class Migration(migrations.Migration):
@@ -11,17 +12,31 @@ class Migration(migrations.Migration):
     ]
 
     operations = [
+        migrations.CreateModel(
+            name='Subject',
+            fields=[
+                ('no', models.AutoField(db_column='sno', primary_key=True, serialize=False, verbose_name='编号')),
+                ('name', models.CharField(db_column='sname', max_length=50, verbose_name='学科名称')),
+                ('intro', models.CharField(db_column='sintro', max_length=511, verbose_name='学科介绍')),
+            ],
+            options={
+                'db_table': 'tb_subject',
+            },
+        ),
         migrations.CreateModel(
             name='Teacher',
             fields=[
-                ('no', models.AutoField(db_column='tno', primary_key=True, serialize=False)),
-                ('name', models.CharField(db_column='tname', max_length=20)),
-                ('job', models.CharField(db_column='tjob', max_length=10)),
-                ('intro', models.CharField(db_column='tintro', max_length=1023)),
-                ('motto', models.CharField(db_column='tmotto', max_length=255)),
+                ('no', models.AutoField(db_column='tno', primary_key=True, serialize=False, verbose_name='编号')),
+                ('name', models.CharField(db_column='tname', max_length=20, verbose_name='姓名')),
+                ('intro', models.CharField(db_column='tintro', max_length=1023, verbose_name='简介')),
+                ('motto', models.CharField(db_column='tmotto', max_length=255, verbose_name='教学理念')),
+                ('photo', models.CharField(blank=True, db_column='tphoto', max_length=511, null=True)),
+                ('manager', models.BooleanField(db_column='tmanager', default=False, verbose_name='是否主管')),
+                ('subject', models.ForeignKey(db_column='sno', on_delete=django.db.models.deletion.PROTECT, to='demo.Subject', verbose_name='所属学科')),
             ],
             options={
                 'db_table': 'tb_teacher',
+                'ordering': ('name',),
             },
         ),
     ]

Day41-55/code/hellodjango/demo/migrations/0002_auto_20180704_1117.py

+# Generated by Django 2.0.6 on 2018-07-04 03:17
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('demo', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='subject',
+            options={'verbose_name': '学科', 'verbose_name_plural': '学科'},
+        ),
+        migrations.AlterModelOptions(
+            name='teacher',
+            options={'ordering': ('name',), 'verbose_name': '讲师', 'verbose_name_plural': '讲师'},
+        ),
+        migrations.AddField(
+            model_name='teacher',
+            name='bad_count',
+            field=models.IntegerField(db_column='sbcount', default=0, verbose_name='差评数'),
+        ),
+        migrations.AddField(
+            model_name='teacher',
+            name='good_count',
+            field=models.IntegerField(db_column='sgcount', default=0, verbose_name='好评数'),
+        ),
+        migrations.AlterField(
+            model_name='teacher',
+            name='photo',
+            field=models.CharField(blank=True, db_column='tphoto', max_length=511, null=True, verbose_name='照片'),
+        ),
+    ]

Day41-55/code/hellodjango/demo/migrations/0002_teacher_photo.py

-# Generated by Django 2.0.6 on 2018-07-03 03:42
-
-from django.db import migrations, models
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('demo', '0001_initial'),
-    ]
-
-    operations = [
-        migrations.AddField(
-            model_name='teacher',
-            name='photo',
-            field=models.CharField(db_column='tphoto', max_length=511, null=True),
-        ),
-    ]

Day41-55/code/hellodjango/demo/migrations/0003_auto_20180703_1355.py

-# Generated by Django 2.0.6 on 2018-07-03 05:55
-
-from django.db import migrations
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('demo', '0002_teacher_photo'),
-    ]
-
-    operations = [
-        migrations.AlterModelTable(
-            name='teacher',
-            table=None,
-        ),
-    ]

Day41-55/code/hellodjango/demo/migrations/0003_auto_20180704_1118.py

+# Generated by Django 2.0.6 on 2018-07-04 03:18
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('demo', '0002_auto_20180704_1117'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='teacher',
+            name='bad_count',
+            field=models.IntegerField(db_column='tbcount', default=0, verbose_name='差评数'),
+        ),
+        migrations.AlterField(
+            model_name='teacher',
+            name='good_count',
+            field=models.IntegerField(db_column='tgcount', default=0, verbose_name='好评数'),
+        ),
+    ]

Day41-55/code/hellodjango/demo/migrations/0004_auto_20180703_1412.py

-# Generated by Django 2.0.6 on 2018-07-03 06:12
-
-from django.db import migrations
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('demo', '0003_auto_20180703_1355'),
-    ]
-
-    operations = [
-        migrations.AlterModelOptions(
-            name='teacher',
-            options={'ordering': ('-no',)},
-        ),
-        migrations.AlterModelTable(
-            name='teacher',
-            table='tb_teacher',
-        ),
-    ]

Day41-55/code/hellodjango/demo/models.py

 from django.db import models
+from django.db.models import PROTECT
 
-# Django框架中包含了ORM(对象关系映射)框架
-# ORM可以帮助我们完成对象模型到关系模型的双向转换
+
+class Subject(models.Model):
+    no = models.AutoField(primary_key=True, db_column='sno', verbose_name='编号')
+    name = models.CharField(max_length=50, db_column='sname', verbose_name='学科名称')
+    intro = models.CharField(max_length=511, db_column='sintro', verbose_name='学科介绍')
+
+    def __str__(self):
+        return self.name
+
+    class Meta(object):
+        db_table = 'tb_subject'
+        verbose_name = '学科'
+        verbose_name_plural = '学科'
 
 
 class Teacher(models.Model):
     no = models.AutoField(primary_key=True, db_column='tno', verbose_name='编号')
     name = models.CharField(max_length=20, db_column='tname', verbose_name='姓名')
-    job = models.CharField(max_length=10, db_column='tjob', verbose_name='职位')
     intro = models.CharField(max_length=1023, db_column='tintro', verbose_name='简介')
     motto = models.CharField(max_length=255, db_column='tmotto', verbose_name='教学理念')
-    photo = models.CharField(max_length=511, db_column='tphoto', null=True)
+    photo = models.CharField(max_length=511, db_column='tphoto', verbose_name='照片', null=True, blank=True)
+    subject = models.ForeignKey(Subject, db_column='sno', on_delete=PROTECT, related_name='+', verbose_name='所属学科')
+    manager = models.BooleanField(default=False, db_column='tmanager', verbose_name='是否主管')
+    good_count = models.IntegerField(default=0, db_column='tgcount', verbose_name='好评数')
+    bad_count = models.IntegerField(default=0, db_column='tbcount', verbose_name='差评数')
 
     class Meta(object):
         db_table = 'tb_teacher'
-        ordering = ('-no', )
+        verbose_name = '讲师'
+        verbose_name_plural = '讲师'
+        ordering = ('name', )

Day41-55/code/hellodjango/demo/views.py

+import json
+
+from django.http import HttpResponse
 from django.shortcuts import render
 
-from demo.models import Teacher
+from demo.models import Subject, Teacher
+
+
+def index(request):
+    ctx = {'subjects_list': Subject.objects.all()}
+    return render(request, 'demo/index.html', ctx)
+
+
+def show_teachers(request, no):
+    teachers = Teacher.objects.filter(subject__no=no)
+    ctx = {'teachers_list': teachers}
+    return render(request, 'demo/teacher.html', ctx)
+
+
+def make_good_comment(request, no):
+    teacher = Teacher.objects.get(pk=no)
+    teacher.good_count += 1
+    teacher.save()
+    ctx = {'code': 200, 'result': f'好评({teacher.good_count})'}
+    return HttpResponse(json.dumps(ctx),
+                        content_type='application/json; charset=utf-8')
 
 
-def home(request):
-    # 通过ORM框架实现持久化操作CRUD
-    ctx = {'teachers_list': list(Teacher.objects.all())}
-    return render(request, 'demo/home.html', ctx)
+def make_bad_comment(request, no):
+    teacher = Teacher.objects.get(pk=no)
+    teacher.bad_count += 1
+    teacher.save()
+    ctx = {'code': 200, 'result': f'差评({teacher.bad_count})'}
+    return HttpResponse(json.dumps(ctx),
+                        content_type='application/json; charset=utf-8')

Day41-55/code/hellodjango/hellodjango/settings.py

@@ -78,7 +78,7 @@ DATABASES = {
     'default': {
         'ENGINE': 'django.db.backends.mysql',
         'NAME': 'demo',
-        'HOST': '120.77.222.217',
+        'HOST': 'localhost',
         'PORT': 3306,
         'USER': 'root',
         'PASSWORD': '123456',

Day41-55/code/hellodjango/hellodjango/urls.py

@@ -19,6 +19,9 @@ from django.urls import path
 from demo import views
 
 urlpatterns = [
-    path('', views.home),
+    path('', views.index, name='index'),
+    path('subjects/<int:no>', views.show_teachers),
+    path('good/<int:no>', views.make_good_comment),
+    path('bad/<int:no>', views.make_bad_comment),
     path('admin/', admin.site.urls),
 ]

Day41-55/code/hellodjango/static/js/jquery.min.js

+/*! jQuery v3.3.1 | (c) JS Foundation and other contributors | jquery.org/license */
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Day41-55/code/hellodjango/templates/demo/home.html

-<!DOCTYPE html>
-{% load staticfiles %}
-<html lang="en">
-<head>
-    <meta charset="UTF-8">
-    <title>讲师信息</title>
-</head>
-<body>
-    {% for x in teachers_list %}
-        <h1>{{ x.name }}老师 - {{ x.job }}</h1>
-        <p><strong>讲师简介</strong></p>
-        <p>{{ x.intro }}</p>
-        <p><strong>教学理念</strong></p>
-        <p>{{ x.motto }}</p>
-        <p>
-            {% if x.photo %}
-            <img src="{% static x.photo %}">
-            {% endif %}
-        </p>
-        <hr>
-    {% endfor %}
-</body>
-</html>
\ No newline at end of file

Day41-55/code/hellodjango/templates/demo/index.html

+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>学科信息</title>
+</head>
+<body>
+    <h1>学科信息</h1>
+    <hr>
+    <ul>
+        {% for subject in subjects_list %}
+        <li>
+            <a href="/subjects/{{ subject.no }}">{{ subject.name }}</a>
+        </li>
+        {% endfor %}
+    </ul>
+</body>
+</html>
\ No newline at end of file

Day41-55/code/hellodjango/templates/demo/teacher.html

+<!DOCTYPE html>
+{% load staticfiles %}
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>讲师信息</title>
+    <style>
+        .container {
+            width: 960px;
+            margin: 0 auto;
+        }
+        .basic {
+            width: 60%;
+            float: left;
+        }
+        .potrait {
+            width: 40%;
+            float: left;
+        }
+        hr {
+            clear: both;
+        }
+        .button {
+            display: inline-block;
+            width: 80px;
+            height: 30px;
+            background-color: red;
+            color: white;
+            font: 16px/30px Arial;
+            text-decoration: none;
+            text-align: center;
+        }
+    </style>
+</head>
+<body>
+    <!-- 页面的显示逻辑 -->
+    {% for x in teachers_list %}
+        <div class="container">
+            <div class="basic">
+                <h1>{{ x.name }}老师</h1>
+                <p><strong>讲师简介</strong></p>
+                <p>{{ x.intro }}</p>
+                <p><strong>教学理念</strong></p>
+                <p>{{ x.motto }}</p>
+                <a href="/good/{{ x.no }}" class="button">好评({{ x.good_count }})</a>
+                <a href="/bad/{{ x.no }}" class="button">差评({{ x.bad_count }})</a>
+            </div>
+            <div class="potrait">
+                {% if x.photo %}
+                <img src="{% static x.photo %}">
+                {% endif %}
+            </div>
+            <hr>
+        </div>
+    {% endfor %}
+    <script src="{% static 'js/jquery.min.js' %}"></script>
+    <script>
+        $(function() {
+            $('.basic .button').on('click', function(evt) {
+                evt.preventDefault();
+                var a = $(evt.target)
+                var url = a.attr('href')
+                $.getJSON(url, function(json) {
+                   if (json.code == 200) {
+                       a.text(json.result);
+                   }
+                });
+            });
+        });
+    </script>
+</body>
+</html>
\ No newline at end of file