Python 选择字段中的动态选择
我正在尝试使用FlaskForms将userID变量传递给WTForms。首先,我将展示运行良好的代码,然后是我需要修改的内容(我不知道如何修改)。我正在添加与某个组关联的新名称 烧瓶形式型号:Python 选择字段中的动态选择,python,flask,flask-wtforms,Python,Flask,Flask Wtforms,我正在尝试使用FlaskForms将userID变量传递给WTForms。首先,我将展示运行良好的代码,然后是我需要修改的内容(我不知道如何修改)。我正在添加与某个组关联的新名称 烧瓶形式型号: class AddName(FlaskForm): name =StringField('Device name', validators=[InputRequired(),Length(min=4, max=30)]) groupID = SelectField('Payload Ty
class AddName(FlaskForm):
name =StringField('Device name', validators=[InputRequired(),Length(min=4, max=30)])
groupID = SelectField('Payload Type', choices=[(1,"Group1"),(2,"Group2")], validators=[InputRequired])
@app.route('/dashboard/addname', methods=['GET', 'POST'])
def addname():
form=AddName()
if form.validate_on_submit():
name=Name(form.name.data,form.groupID.data)
db.session.add(name)
db.session.commit()
return "New name added"
<form method="POST" action="/dashboard/addname">
<h2>Add name</h2>
{{ form.hidden_tag() }}
{{ wtf.form_field(form.name) }}
{{ wtf.form_field(form.groupID) }}
<button type="submit">Add name</button>
</form>
@app.route('/dashboard/addname', methods=['GET', 'POST'])
def addname():
available_groups=db.session.query(Groups).filter(Groups.userID == currend_user.userID).all()
#Now forming the list of tuples, so it's ok for SelectField
groups_list=[(i.groupID, i.groupName) for i in available_groups]
form=AddName()
if form.validate_on_submit():
name=Name(form.name.data,form.groupID.data)
db.session.add(name)
db.session.commit()
return "New name added"
class AddName(FlaskForm):
name =StringField('Device name', validators=[InputRequired(),Length(min=4, max=30)])
groupID = SelectField('Payload Type', coerce=int, validators=[InputRequired])
查看模型:
class AddName(FlaskForm):
name =StringField('Device name', validators=[InputRequired(),Length(min=4, max=30)])
groupID = SelectField('Payload Type', choices=[(1,"Group1"),(2,"Group2")], validators=[InputRequired])
@app.route('/dashboard/addname', methods=['GET', 'POST'])
def addname():
form=AddName()
if form.validate_on_submit():
name=Name(form.name.data,form.groupID.data)
db.session.add(name)
db.session.commit()
return "New name added"
<form method="POST" action="/dashboard/addname">
<h2>Add name</h2>
{{ form.hidden_tag() }}
{{ wtf.form_field(form.name) }}
{{ wtf.form_field(form.groupID) }}
<button type="submit">Add name</button>
</form>
@app.route('/dashboard/addname', methods=['GET', 'POST'])
def addname():
available_groups=db.session.query(Groups).filter(Groups.userID == currend_user.userID).all()
#Now forming the list of tuples, so it's ok for SelectField
groups_list=[(i.groupID, i.groupName) for i in available_groups]
form=AddName()
if form.validate_on_submit():
name=Name(form.name.data,form.groupID.data)
db.session.add(name)
db.session.commit()
return "New name added"
class AddName(FlaskForm):
name =StringField('Device name', validators=[InputRequired(),Length(min=4, max=30)])
groupID = SelectField('Payload Type', coerce=int, validators=[InputRequired])
模板:
class AddName(FlaskForm):
name =StringField('Device name', validators=[InputRequired(),Length(min=4, max=30)])
groupID = SelectField('Payload Type', choices=[(1,"Group1"),(2,"Group2")], validators=[InputRequired])
@app.route('/dashboard/addname', methods=['GET', 'POST'])
def addname():
form=AddName()
if form.validate_on_submit():
name=Name(form.name.data,form.groupID.data)
db.session.add(name)
db.session.commit()
return "New name added"
<form method="POST" action="/dashboard/addname">
<h2>Add name</h2>
{{ form.hidden_tag() }}
{{ wtf.form_field(form.name) }}
{{ wtf.form_field(form.groupID) }}
<button type="submit">Add name</button>
</form>
@app.route('/dashboard/addname', methods=['GET', 'POST'])
def addname():
available_groups=db.session.query(Groups).filter(Groups.userID == currend_user.userID).all()
#Now forming the list of tuples, so it's ok for SelectField
groups_list=[(i.groupID, i.groupName) for i in available_groups]
form=AddName()
if form.validate_on_submit():
name=Name(form.name.data,form.groupID.data)
db.session.add(name)
db.session.commit()
return "New name added"
class AddName(FlaskForm):
name =StringField('Device name', validators=[InputRequired(),Length(min=4, max=30)])
groupID = SelectField('Payload Type', coerce=int, validators=[InputRequired])
这里的主要思想是在实例化之后将选项列表分配给字段。为此,您需要使用参数
强制=int
。强制关键字arg到SelectField表示我们使用int()强制表单数据。默认强制是unicode()
正确的表单模型:
class AddName(FlaskForm):
name =StringField('Device name', validators=[InputRequired(),Length(min=4, max=30)])
groupID = SelectField('Payload Type', choices=[(1,"Group1"),(2,"Group2")], validators=[InputRequired])
@app.route('/dashboard/addname', methods=['GET', 'POST'])
def addname():
form=AddName()
if form.validate_on_submit():
name=Name(form.name.data,form.groupID.data)
db.session.add(name)
db.session.commit()
return "New name added"
<form method="POST" action="/dashboard/addname">
<h2>Add name</h2>
{{ form.hidden_tag() }}
{{ wtf.form_field(form.name) }}
{{ wtf.form_field(form.groupID) }}
<button type="submit">Add name</button>
</form>
@app.route('/dashboard/addname', methods=['GET', 'POST'])
def addname():
available_groups=db.session.query(Groups).filter(Groups.userID == currend_user.userID).all()
#Now forming the list of tuples, so it's ok for SelectField
groups_list=[(i.groupID, i.groupName) for i in available_groups]
form=AddName()
if form.validate_on_submit():
name=Name(form.name.data,form.groupID.data)
db.session.add(name)
db.session.commit()
return "New name added"
class AddName(FlaskForm):
name =StringField('Device name', validators=[InputRequired(),Length(min=4, max=30)])
groupID = SelectField('Payload Type', coerce=int, validators=[InputRequired])
正确视图:
@app.route('/dashboard/addname', methods=['GET', 'POST'])
def addname():
available_groups=db.session.query(Groups).filter(Groups.userID == currend_user.userID).all()
#Now forming the list of tuples for SelectField
groups_list=[(i.groupID, i.groupName) for i in available_groups]
form=AddName()
#passing group_list to the form
form.groupID.choices = groups_list
if form.validate_on_submit():
name=Name(form.name.data,form.groupID.data)
db.session.add(name)
db.session.commit()
return "New name added"
有没有更好的办法?比如使用元类之类的?