ORM版学员管理系统2
一、展示学生信息
1、url 部分
url(r'^student_list/', app01_views.student_list, name="student_list"),
2、视图部分
def student_list(request):
student_list = models.Student.objects.all()
return render(request, "student_list.html", {"student_list": student_list})
3、前端部分
<!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="UTF-8"> <meta http-equiv="x-ua-compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>学生列表</title> </head> <body> <a href="{% url 'add_student' %}">添加学生</a> <table border="1"> <thead> <tr> <th>#</th> <th>id</th> <th>学生姓名</th> <th>学生班级</th> <th>开班日期</th> <th>操作</th> </tr> </thead> <tbody> {% for student in student_list%} <tr> <td>{{ forloop.counter}}</td> <td>{{ student.id }}</td> <td>{{ student.sname }}</td> <td>{{ student.cid.cname }}</td> <td>{{ student.cid.first_day|date:'Y-m-d' }}</td> <td> <a href="{% url 'delete_student' student.id %}">删除</a> <a href="{% url 'edit_student' student.id %}">编辑</a> </td> </tr> {% endfor %} </tbody> </table> </body> </html>
二、删除学生信息
1、url 部分
url(r'^delete_student/(?P<sid>\d+)$', app01_views.delete_student, name="delete_student"),
2、视图部分
def delete_student(request, sid):
models.Student.objects.filter(id=sid).delete()
return redirect(reverse("student_list"))
3、前端部分
<a href="{% url 'delete_student' student.id %}">删除</a>
三、添加学生信息
1、url 部分
url(r'^add_student/$', app01_views.add_student, name="add_student"),
2、视图部分
def add_student(request):
if request.method == "POST":
sname = request.POST.get("sname")
class_id = request.POST.get("class_id")
models.Student.objects.create(sname=sname, cid_id=class_id)
return redirect(reverse("student_list"))
class_list = models.Class.objects.all()
return render(request, "add_student.html", {"class_list": class_list})
3、前端部分
<!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="UTF-8"> <meta http-equiv="x-ua-compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>添加学生</title> </head> <body> <form action="{% url 'add_student' %}" method="post"> {% csrf_token %} <p>学生姓名：<input type="text" name="sname"></p> <label for="class_id">所在班级：</label> <select name="class_id" id="class_id"> {% for class in class_list %} <option value="{{ class.id }}">{{ class.cname }}</option> {% endfor %} </select> <p><input type="submit" value="提交"></p> </form> </body> </html>
四、编辑学生信息
1、url 部分
url(r'^edit_student/(?P<sid>\d+)$', app01_views.edit_student, name="edit_student"),
2、视图部分
def edit_student(request, sid):
# 获取到编辑的学生对象
student_obj = models.Student.objects.get(id=sid)
# 获取所有的班级数据
class_list = models.Class.objects.all()
if request.method == "POST":
sname = request.POST.get("sname")
class_id = request.POST.get("class_id")
student_obj.sname = sname
student_obj.cid_id = class_id
student_obj.save()
return redirect(reverse("student_list"))
return render(request, "edit_student.html", {"student": student_obj, "class_list": class_list})
3、前端部分
<!DOCTYPE html> <html lang="zh-CN"> <head> <meta charset="UTF-8"> <meta http-equiv="x-ua-compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>编辑学生信息</title> </head> <body> <form action="{% url 'edit_student' student.id %}" method="post"> {% csrf_token %} <p>学生姓名：<input type="text" name="sname" value="{{ student.sname }}"></p> <label for="class_id">所在班级：</label> <select name="class_id" id="class_id"> {% for class in class_list %} {% if class.id == student.cid_id %} <option value="{{ class.id }}" selected>{{ class.cname }}</option> {% else %} <option value="{{ class.id }}">{{ class.cname }}</option> {% endif %} {% endfor %} </select> <p><input type="submit" value="提交"></p> </form> </body> </html>
五、基于对象的跨表查询
1、一对多查询（班级表和学生表）
正向查询（由学生表查询班级表）
查询学生的班级信息
>>> from app01 import models >>> models.Student.objects.first() <Student: Student object> >>> student_obj = models.Student.objects.first() >>> student_obj.cid <Class: Class object> >>> student_obj.cid.cname '全栈1期' >>> student_obj.cid_id 1
反向查询（由班级表查询学生表）
查询班级的学生信息
