WTForms:动态创建名称和ID属性
我的表格允许用户为特定数量的篮球队输入特定数量的名字。 这些数字不断更新,所以我需要创建一个动态表单。
假设我有以下Flask视图:
@app.route('/dynamic', methods=['GET', 'POST'])
def dynamic():
teams = ['Warriors', 'Cavs']
name_count = 2
return render_template('dynamic.html', teams=teams, name_count=name_count)
以及HTML模板dynamic.html
的以下表单:
<form method='POST' action='/dynamic'>
{% for team_index in range(teams | count) %}
{% for name_index in range(name_count) %}
<input type="text"
class="form-control"
id="team{{ team_index }}_name{{ name_index }}"
name="team{{ team_index }}_name{{ name_index }}">
{% endfor %}
{% endfor %}
<form>
其产生如下形式:
<form method='POST' action='/dynamic'>
<input type="text" class="form-control" id="team0_name0" name="team0_name0">
<input type="text" class="form-control" id="team0_name1" name="team0_name1">
<input type="text" class="form-control" id="team1_name0" name="team1_name0">
<input type="text" class="form-control" id="team1_name1" name="team1_name1">
<form>
我喜欢Flask-WTF库,所以我想知道如何使用它(或简单地wtforms)来呈现这种形式。 我不确定这是甚至可能的,因为wtforms需要每个输入的硬编码字段名称。
想通了。 我需要使用WTForms Fieldlist
和FormField
机箱。
class PlayerForm(FlaskForm):
player = Fieldlist(StringField('Player'))
class TeamForm(FlaskForm):
team = Fieldlist(FormField(PlayerForm))
@app.route('/dynamic', methods=['GET', 'POST'])
def dynamic():
teams = ['Warriors', 'Cavs']
name_count = 2
# Build dictionary to prepopulate form
prepop_data = {'team': [{'player': ['' for p in range(name_count)]} for team in teams]}
# Initialize form
form = TeamForm(data=prepop_data)
return render_template('dynamic.html', form=form)
并通过jinja2解压(第一个字段的id
和name
属性= team-0-player-0
):
<form method="POST" action="/dynamic">
{{ form.csrf_token }}
{% for team in form.team %}
{{ team.csrf_token }}
{% for player in team.player %}
{{ render_field(player) }}
{% endfor %}
{% endfor %}
</form>
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