第一页后有分页的Jinja烧瓶问题

时间:2018-07-09 10:41:33

标签: flask pagination flask-sqlalchemy flask-wtforms

我创建了一个下拉菜单,用于从SQL数据库中按项目编号搜索零件。第一页加载了正确的部分,但随后的任何页面都会出现以下错误:

  

TypeError:show_compound()缺少1个必需的位置参数:“ search_string”

根据我在网上看到的内容,似乎可能需要使用*args或将search_string传递给模板,但是我不确定如何使用*args或在哪里插入模板上的search_string值。

@parts_database.route('/searchcompound', methods=['GET', 'POST'])
@login_required
def compounds_search():
    form = ProjectSearch(request.form)
    if form.validate_on_submit():
        search_string = form.select.data.project_number

        return show_compound(search_string)

    return render_template('parts_database/search_compounds.html', form=form)

@parts_database.route('/showcompound', methods=['GET'])
@login_required
def show_compound(search_string):
    page = request.args.get('page', 1, type=int)

    pagination = PartsTable.query.filter_by(project_number=search_string).order_by(PartsTable.part_number).paginate(page, per_page=15, error_out=False)

    compound = pagination.items
    page_10 = pagination.next_num+9
    if page_10 > pagination.pages:
        pageincrement = pagination.pages
    else:
        pageincrement = page_10

    page_decrement = page - 10
    if page_decrement < 1:
        page_decrement = 1

    return render_template('parts_database/showpartstable.html', compound=compound, pagination=pagination, pageincrement=pageincrement, page_decrement=page_decrement)

模板:

{% extends "base.html" %}
{% import "bootstrap/wtf.html" as wtf %}
{% import "_macros.html" as macros %}

{% block title %}Amos{% endblock %}

{% block page_content %}
<div class="page-header">
    <a href="{{ url_for('main.render_csv', jobname_filename = 'Parts_PDB') }}"><h1>Parts</h1></a>

{% include 'parts_database/_showpartstable.html' %}
    {% if pagination %}
    <div class="pagination">
    {{ macros.pagination_widget(page_decrement, pageincrement, pagination, '.show_compound') }}
</div>
    {% endif %}
</div>    
{% endblock %}

1 个答案:

答案 0 :(得分:1)

如果视图带有参数,则必须在路由中包含该变量。

在您的情况下,您在search_string路线定义中缺少show_compound。尝试这样的事情:

@parts_database.route('/showcompound/<search_string>', methods=['GET'])
@login_required
def show_compound(search_string):
    (...)

编辑:

此外,我很乐意重定向,而不是调用另一个视图的函数。

替换此:

if form.validate_on_submit():
    search_string = form.select.data.project_number

    return show_compound(search_string)

与此:

在此之前,您必须导入重定向:

from flask import redirect  # (Add this at the top)

(...)

if form.validate_on_submit():
    search_string = form.select.data.project_number

    return redirect(url_for('parts_database.show_compound', search_string=search_string))