from django.shortcuts import render,redirect
from django.contrib.auth.models import User
from django.http import HttpResponse
from django.contrib.auth import authenticate
from django.contrib import auth
# Create your views here.
def showall(request):
    mynames = ''
    for i in User.objects.all():
        #myname += str(i) + '<br>'
        mynames += i.username + '<br>'
    return HttpResponse(mynames)

def find(request):
    try:
        a1 = User.objects.get(username='john')
        return HttpResponse('找到john')
    except:
        a1 = None
        return HttpResponse('查無此人')

def add(request):
    #要新增一筆:tom
    #先判別是否已經存在資料表內
    try:
        a1 = User.objects.get(username='mike')        
    except:
        a1 = None
    #若無，則新增一筆
    if a1==None:
       a2 = User.objects.create_user('mike','mike@gmail.com','mike963852')
       a2.first_name = '麥克'
       a2.last_name = '李'
       a2.is_staff = True
       a2.save()
       return redirect('/showall/')
    else:
        return HttpResponse('mike 已經存在')