前台:
$('.btn').click(function(){
$.ajax({
url:'/ajaxload/'
type: 'get|post',
data: { usr: 'abc', pwd: '123', }, success: function(data) { // data为string类型数据 }, error: function(e) { // 请求失败分支 } })})
后台:
def ajax_load(request):
if request.is_ajax(): if request.method == 'GET': usr = request.GET.get('usr', None) pwd = request.GET.get('pwd', None) if request.method == 'POST': usr = request.POST.get('usr', None) pwd = request.POST.get('pwd', None) return HttpResponse('OK')## ajax - json数据响应
前台
```js
$.ajax({ ..., dataType: 'json', // 如果用HttpResponse返回数据可能出现请求失败 data: { usr: 'abc', pwd: '123', }, success: function(data) { // data为object类型 }})后台
```python
# HttpResponse返回json类型数据 (不建议)import jsonjson_data = json.dumps({'msg': 'OK'}, ensure_ascii=False)return HttpResponse(json_data, content_type='application/json')from django.http import JsonResponse
# JsonResponse返回json类型数据 (建议)data = {'msg': 'OK'}return JsonResponse(data, safe=False, json_dumps_params={'ensure_ascii': False})## ajax - json数据请求（了解）
前台
```js
$.ajax({ ..., // 按json格式提交json字符串数据 contentType: 'application/json', // 将json数据格式化为字符串 data: JSON.stringify({usr: 'abc', pwd: '123'}), success: function(data) { }})```后台
```python
# 后台的数据，在request对象的body中不再被主动解析到GET|POST中import json# 手动解析json字符串，转化字典并替代request.POST对象，就可以继续用request.POST获取数据json_dic = json.loads(request.body)request.POST = json_dic...# 可以封装成装饰器
## Django分页模块
```python
from django.core.paginator import Paginator# 分页对象列表
book_list = Book.objects.all()# 分页对象paginator = Paginator(book_list, 6) # 分页对象列表，每一页对象(最大)数# 对象总个数count = paginator.count# 总分页树num_pages = paginator.num_pages# 页码列表(可迭代对象)page_range = paginator.page_range# 某一具体页
page = paginator.page(3) # 具体第几页# 是否有上一页page.has_previous()# 上一页编码page.previous_page_number()# 是否有下一页page.has_next()# 下一页编码page.next_page_number()```
## 批量插入数据
```python
book_list = []for i in range(100): book = Book(name='book%s' % i, price=11.11, publish_date='2018-1-1', publish_id=1) book_list.append(book)# 操作对象列表，一次操作多少条数据Book.objects.bulk_create(book_list, 20)```
## 分页器代码
前台
```html
<nav aria-label="Page navigation"> <ul class="pagination"> <li> {% if current_page.has_previous %} <a href="/book/?page={ { current_num|add:-1 }}" aria-label="Previous"> {% else %} <a href="javascript:void(0)" aria-label="Previous"> {% endif %} <span aria-hidden="true">«</span> </a> </li> {% if current_num == 1 %} <li class="active"> {% else %} <li> {% endif %} <a href="/book/?page=1">1</a></li> <li><a href="javascript:void(0)">...</a></li> {% for num in page_range %} {% if current_num == num %} <li class="active"> {% else %} <li> {% endif %} <a href="/book/?page={ { num }}">{ { num }}</a></li> {% endfor %} <li><a href="javascript:void(0)">...</a></li>{% if current_num == num_pages %}
<li class="active"> {% else %} <li> {% endif %} <a href="/book/?page={ { num_pages }}">{ { num_pages }}</a></li><li>
{% if current_page.has_next %} <a href="/book/?page={ { current_num|add:1 }}" aria-label="Next"> {% else %} <a href="javascript:void(0)" aria-label="Next"> {% endif %}<span aria-hidden="true">»</span>
</a> </li> </ul></nav>```后台
```python
def show_book(request): title = '图书详情' header = "图书管理系统" current_num = int(request.GET.get('page', 1)) book_list = Book.objects.all() paginator = Paginator(book_list, 6) num_pages = paginator.num_pages if num_pages > 5: if current_num < 4: page_range = range(2, 5) elif current_num > paginator.num_pages - 3: page_range = range(num_pages - 3, num_pages) else: page_range = range(current_num - 1, current_num + 2) else: page_range = paginator.paginator current_page = paginator.page(current_num)return render(request, 'book.html', locals())