使用FieldList和FormField

Question

我们有以下表单，我们正在尝试为每个组创建GroupRoleForms列表。

class FullNameMixIn():
    full_name = TextField(
        'Full name', [
            validators.required(message=u"Full name is required")
        ])

class GroupRoleForm(Form):
    group =BooleanField('Group', default=False)
    role = SelectField(
            'Role',choices=[
            ("none", "----------"), 
            ('approver', 'Approver'),
            ('editor', 'Editor')
            ])

class AdminEditUserForm(Form, FullNameMixIn):
    group_roles = FieldList(FormField(GroupRoleForm))

如何创建包含预填充的GroupRoleForms列表的AdminEditUserForm实例？

目前我们正试图这样做：

form = forms.AdminEditUserForm()
for group in  company.groups:
    group_role_form = forms.GroupRoleForm()
    group_role_form.group.label =  group.name
    group_role_form.group.name = group.id
    form.group_roles.append_entry(group_role_form)
return dict(edit_user_form = form )

Answer 1

解释

在Form的data或formdata关键字参数中，您只需要一个字典，其中的key与包含iterable的FieldList子字段相匹配。iterable中的项依次需要具有与FieldList的字段列表匹配的项w/属性。

如果您按照下面的示例操作，我将得到预填充的嵌套表单。

守则

from collections import namedtuple

from wtforms import validators
from wtforms import Form
from wtforms import SelectField
from wtforms import BooleanField
from wtforms import TextField
from wtforms import FieldList
from wtforms import FormField

from webob.multidict import MultiDict

# OP's Code
class FullNameMixIn():
    full_name = TextField(
        'Full name', [
            validators.required(message=u"Full name is required")
        ])

class GroupRoleForm(Form):
    group =BooleanField('Group', default=False)
    role = SelectField(
            'Role',choices=[
            ("none", "----------"), 
            ('approver', 'Approver'),
            ('editor', 'Editor')
            ])

class AdminEditUserForm(Form, FullNameMixIn):
    group_roles = FieldList(FormField(GroupRoleForm))

# create some groups
Group = namedtuple('Group', ['group', 'role'])
g1 = Group('group-1', 'none')
g2 = Group('group-2', 'none')

# drop them in a dictionary 
data_in={'group_roles': [g1, g2]}

# Build form 
test_form = AdminEditUserForm(data=MultiDict(data_in))

# test print
print test_form.group_roles()

呈现的HTML（截断）

<ul id="group_roles">
   <li>
      <label for="group_roles-0">Group Roles-0</label> 
      <table id="group_roles-0">
         <tr>
            <th><label for="gr
               oup_roles-0-group">Group</label></th>
            <td><input checked id="group_roles-0-group" name="group_roles-0-group" type="checkbox" value="y"><
               /td>
         </tr>
         <tr>
            <th><label for="group_roles-0-role">Role</label></th>
            <td>
               <select id="group_roles-0-role" name="group_roles-0-role">
                  <option
                     selected value="none">----------</option>
                  <option value="approver">Approver</option>
                  <option value="editor">Editor</option>
               </select>
            </td
               >
         </tr>
      </table>
   </li>
   <li>
      <label for="group_roles-1">Group Roles-1</label> 
      <table id="group_roles-1">
         <tr>
            <th><label for="group_roles-1-gro
               up">Group</label></th>
            <td><input checked id="group_roles-1-group" name="group_roles-1-group" type="checkbox" value="y"></td>
         </tr>
         <tr>
            <t
               h>
            <label for="group_roles-1-role">Role</label></th>
            <td>
               <select id="group_roles-1-role" name="group_roles-1-role">
                  <option selected value
                     ="none">----------</option>
                  <option value="approver">Approver</option>
                  <option value="editor">Editor</option>
               </select>
            </td>
         </tr>
      </table>
      <
      /li>
</ul>

...

Answer 2

我不熟悉这些包裹，但我想试试：

class AdminEditUserForm(Form, FullNameMixIn):
    def __init__(self, groups):
        super(AdminEditUserForm, self).__init__()
        self.group_roles = FieldList(FormField(GroupRoleForm))
        for group in groups:
            self.group.label = group.name
            self.group.name = group.id
            self.group_roles.append_entry(self.group)  
            # If this doesn't create a copy of the GroupRoleForm 
            # superclass in group_roles, then you need a method to do it
            self.__clear_group()

    def __clear_group(self):
        # copy GroupRoleForm object, if needed
        # delete GroupRoleForm object
        ...

你可以这样称呼它：

form = forms.AdminEditUserForm(company.groups)