Django配合MySQL学习Django模型外键的建立和使用

Django 模型建立外键

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在模型中建立外键是很简单的，基本操作如下

class Table(models.Model)
    column_name = models.ForeignKey(other-TableClassName)

来看看这个模型(models.py)是啥：

from django.db import models

# Create your models here.
class Score(models.Model):
    sid =   models.CharField(max_length=20,primary_key=True)
    value = models.IntegerField()
    class meta:
        db_table = "siteScore"
    def __unicode__(self):
        return self.name

class Student(models.Model):
    id = models.IntegerField(primary_key=True)
    score = models.ForeignKey(Score)
    name = models.CharField(max_length=10)

Django 外键的使用，插入和查询

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这个就不多说了，直接上代码：

from django.shortcuts import render
from django.http import HttpResponse
from models import Score,Student
# Create your views here.

def insertScore(request):
    sid = request.GET['sid']
    value = request.GET["value"]
    Score.objects.create(sid=sid, value=value)
    return HttpResponse("ok")
def insertStudent(request):
    pid = request.GET['pid']
    sid = request.GET['sid']
    name = request.GET["name"]
    psid = Score.objects.get(sid=sid)
    Student.objects.create(id=int(pid),score=psid, name=name)
    return HttpResponse("ok")
def search(request):
    name = request.GET["name"]
    student = Student.objects.get(name=name)
    score = student.score.value
    string = "%s %s"%(name, score)
    return HttpResponse(string)