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))

我们如何能够创造一个AdminEditUserForm包含的预填充的列表实例GroupRoleForms ？

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

说明

在您的data或formdata为关键字参数Form ，你只需要使用的字典key的匹配FieldList包含一个可迭代子。 该可迭代需要的项目依次具有与FieldList的字段列表匹配的属性。

如果你按照下面的例子我得到预先填充好的嵌套表格。

编码

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()

渲染的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，但我会采取刺：

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
        ...

然后你可以像这样调用它：

form = forms.AdminEditUserForm(company.groups)