5

I'm using Sails 0.9.8 paired with MySQL and wanting to do something like this

localhost:1337/player/view/<username of player>

instead of

localhost:1337/player/view/<id of player>

So I put something like this in the model:

'username' : {
        type: 'string',
        unique: true,
        minLength: 4,
        maxLength: 32,
        required: true
    },

But I've got an error whenever I run sails lift:

{ [Error: ER_TOO_LONG_KEY: Specified key was too long; max key length is 767 bytes] code: 'ER_TOO_LONG_KEY', index: 0 }

So after I run through the modules, I discovered that it was because by default Sails give string-type attribute a length of 255 in the database. The given length can be overridden with 'size', but it causes another error when creating a record.

'username' : {
        type: 'string',
        unique: true,
        minLength: 4,
        maxLength: 32,
        size: 32,
        required: true
    },

The error caused when creating a record:

Error: Unknown rule: size
at Object.match (<deleted>npm\node_modules\sails\node_modules\waterline\node_modules\anchor\lib\match.js:50:9)
at Anchor.to (<deleted>\npm\node_modules\sails\node_modules\waterline\node_modules\anchor\index.js:76:45)
at <deleted>\npm\node_modules\sails\node_modules\waterline\lib\waterline\core\validations.js:137:33

The question is, how do I specify the size of the string column (so that I can use the unique key) without getting an error when creating a record?

4

2 回答 2

9

您可以通过 types 对象定义自定义验证规则来解决此问题。具体来说，可以通过定义一个size始终返回 true 的自定义验证器来解决给定的问题。

// api/models/player.js
module.exports = {
  types: {
    size: function() {
       return true;
    }
  },

  attributes: {
    username: {
      type: 'string',
      unique: true,
      minLength: 4,
      maxLength: 32,
      size: 32,
      required: true
    }
  }
}
于 2014-02-11T16:02:21.590 回答
2

标记的答案是安静的旧。根据最新的sails版本（截至撰写本答案之日为1.0.2），

我使用了columnType这样的属性：

attributes: {

  longDescription: {
    type: 'string',
    columnType: 'text'
  }
}
于 2018-05-11T01:18:56.570 回答