index.html
---------------------------------
{% extends "layout.html" %} {% block body %}
<form method="POST" action="{{ url_for('search') }}">
    <table>
        <tr>
            <td>
                {{ form.searchPhrase }}
            </td>
            <td>
                <ul>
                    {% for error in form.name.errors %}
                    <li>{{ error }}</li>
                    {% endfor %}
                </ul>
            </td>
        </tr>
        <tr>
            <td colspan="2">
                <input type="submit" value="Search" />
            </td>
        </tr>
</form>

{% endblock %}
-----------------------
views.py
-----------------------

@app.route('/', methods=['GET', 'POST'])
def search():
    form = SearchForm(request.form)
    if request.method == 'POST':
        return results(form)

    return render_template("index.html", form=form)
------------------------
forms.py
------------------------
class SearchForm(FlaskForm):
    searchPhrase = StringField([validators.Length(min=2, max=64)])

    class Meta:
        csrf = False