可以访问所有节点的变形/考兰德验证器? [英] Deform/Colander validator that has access to all nodes?

问题描述

如何在Deform/Colander中定义可以访问的自定义验证器 所有节点值.我需要从两个字段中访问值，以便确定特定值是否有效?

How do you define a custom validator in Deform/Colander that has access to all node values. I need to access the values from two fields in order to decide if a particular value is valid or not?

推荐答案

要为所有漏勺字段放置验证器，我们可以简单地做到这一点

To place a validator for all colander fields we can simply do this

验证器方法:

def user_DoesExist(node,appstruct):
if DBSession.query(User).filter_by(username=appstruct['username']).count() > 0:
    raise colander.Invalid(node, 'Username already exist.!!')

架构:

class UserSchema(CSRFSchema):
username = colander.SchemaNode(colander.String(), description="Extension of the user")
name = colander.SchemaNode(colander.String(), description='Full name')
extension = colander.SchemaNode(colander.String(),description='Extension')
pin = colander.SchemaNode(colander.String(), description='PIN')

查看:

@view_config(route_name='add_user', permission='admin', renderer='add_user.mako')
def add_user(self):
    #Here you can provide validator method as a parameter. And you can validate any field you want.
    schema = UserSchema(validator = user_DoesExist).bind(request=self.request)
    form = deform.Form(schema, action=self.request.route_url('add_user'), buttons=('Add User','Cancel'))

如果我的情况不对，请纠正我.

Correct me if i am wrong in my scenario.

谢谢

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