[量化投资系统]Django从数据库中实现筛选及分页

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Django筛选数据分类遇到只能跳转第一页，第二页无数据的情况。

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1.models.py创建模型

class User(models.Model):
    uname= models.CharField(max_length=20)
    uEmail= models.CharField(max_length=35)
    uphone= models.CharField(max_length=15)

2.views.py从数据库中筛选数据

    if request.method == 'POST':
        name = request.POST.get('code')
    else:
        name = request.GET.get('code')
    UserList = User.objects.filter(uphone=name).order_by()

3.分页器

    paginator = Paginator(UserList,2)  # 3 posts in each page
    page = request.GET.get('page')
    try:
        pagedata = paginator.page(page)
    except PageNotAnInteger:
        # If page is not an integer deliver the first page
        pagedata = paginator.page(1)
    except EmptyPage:
    # # If page is out of range deliver last page of results
        pagedata = paginator.page(paginator.num_pages)

4.传递数据

    return (render(request,'Qt15606/students.html',{
    'name':name,'page': pagedata,'pagedata': pagedata}))

5.前端界面students.html

<div class="pagination">
    <span class="step-links">
        {
    % if page.has_previous %}
            <a style="font-weight:bold;color:#383957;" href="?page=1&code={
    {name}}" >第一页</a>
            <a class="btn btn-primary btn-lg active" href="?page={
    {page.previous_page_number}}&code={
    {name}}">上一页</a>
        {
    % endif %}
                <span style="font-weight:bold;color:#383957" class="current">
                    第{
    {
     page.number}}页 ··· 共 {
    {
     page.paginator.num_pages}}页
                </span>
        {
    % if page.has_next %}
            <a class="btn btn-primary btn-lg active" href="?page={
    {page.next_page_number }}&code={
    {name}}">下一页</a>
            <a class="btn btn-primary btn-lg active" href="?page={
    {page.paginator.num_pages}}&code={
    {name}}">最后一页</a>
        {
    % endif %}
    </span>
</div>

其中最重要的一步是要在链接上加筛选的条件。href="?page={ {page.next_page_number }}&code={ {name}}"