我有许多字符串属性。如何确保这些字符串不为空？比 更具声明性的东西minLength: 1。与 HTML 类似required，其对于文本输入的某种等价物是minlength=1.
{
"type": "object",
"patternProperties": {
"^(?:num|str|text|check|bool)[1-3]$": {
"type": "string",
"maxLength": 50
}
},
"additionalProperties": false
}