【Python】validator进行数据校验

https://pypi.org/project/validator.py/

校验参数必要性

from validator import Required, In, InstanceOf, Length, validate, Range

rules = {
　　# 1、Required 必要
　　# 2、长度1-255
　　# 3、类型string
　　'name': [Required, Length(1, 255), InstanceOf(str)]

}

data = {'name': ''}
chk = validate(rules, data)
print(chk)
# ValidationResult(valid=False, errors={'a': ['must be between 1 and 255  elements in Length']})

选填

# 非 Required 即可选
rules = {
　　'name': [Length(1, 255), InstanceOf(str)],
　　'user_id': [Length(11), InstanceOf(int)],
}

参数间的合法性检查

# 在某些需求中，接口需要针对不同参数值检查另外参数的合法性
rules = {
  'name': [Required, Length(1, 255), InstanceOf(str)],
  'value': [Required],
  'type': [
    Required, InstanceOf(int), range(0, 2)
    If(Equals(0, Then({'value': [InstanceOf(int)]}))),
    If(Equals(1, Then({'value': [InstanceOf(str), Length(1, 255)]}))),
    If(Equals(2, Then({'value': [InstanceOf(bool)]}))),
  ],
}