Question

我正在尝试实施“高级搜索”，但为了这个问题，我会更简单一点。

到目前为止的工作原理：

@app.route('/advanced_search', methods=['GET', 'POST'])
def advanced_search():
    form = AdvancedProductSearch()   # this is a SelectMultipleField
    countries = ['Canada', 'France', 'Mexico', 'Nigeria']
    form.categories.choices = [(c,c) for c in countries]
    if form.validate_on_submit():
        countrydata = form.countries.data
        res = models.Product.query.filter(models.Product.country.in_(countrydata)).all()
        # Now I have my search results, what do I do with them?
    return render_template('advanced_search.html', title='Advanced Search', form=form)

我的计划是必须有另一种观点：advanced_search_results，应该用于渲染结果，但我不知道它应该如何运作。

@app.route('/advanced_search_results', methods=['GET', 'POST'])
def advanced_search_results(query):
    #what to do?
    return render_template('advanced_search_results.html', title='Search Results')

我可以想到两种方法：

1）以某种方式将res中的所有数据行传递到advanced_search_results()视图，但我不知道如何做到这一点。

2）使用重定向将所需的搜索查询传递给advanced_search_results()并在那里进行数据库搜索。我也不确定该怎么做。

Answer 1

只需返回必要的视图：

res = models.Product.query.filter(models.Product.country.in_(countrydata)).all()
# Now I have my search results, let's send them back
return render_template('advanced_search_results.html', title='Results',
                       results=res)

然后，在您的视图中，您可以像对任何其他模型列表一样循环结果：

{% for result in results %}
  {{ result.name }}<br>
  {{ result.country }}<br>
  <hr noshade>
{% endfor %}

或者，如果您想将其托管在其他网址上，只需将action页面上的表单的advanced-search更改为指向advanced-search-results：

<form action="/advanced_search_results" method="post">
    {# etc ... #}
</form>

然后您可以验证搜索并显示结果或重定向用户并显示错误消息：

@app.route('/advanced_search_results', methods=['POST'])
def advanced_search_results():
    form = AdvancedProductSearch()
    countries = ['Canada', 'France', 'Mexico', 'Nigeria']
    form.categories.choices = [(c,c) for c in countries]
    if not form.validate_on_submit():
        flash("There were errors with your submission")
        return redirect(url_for('advanced_search'))

    countrydata = form.countries.data
    res = models.Product.query.filter(models.Product.country.in_(countrydata)).all()
    return render_template('advanced_search_results.html',
                           title='Search Results',
                           results=res)

这使您的advanced_search方法更简单：

@app.route('/advanced_search', methods=['GET'])
def advanced_search():
    form = AdvancedProductSearch()   # this is a SelectMultipleField
    countries = ['Canada', 'France', 'Mexico', 'Nigeria']
    form.categories.choices = [(c,c) for c in countries]
    return render_template('advanced_search.html', title='Advanced Search', form=form)

如何在烧瓶中进行这种复杂的搜索查询？

1 个答案: