回送Mysql连接器：始终识别BIT（1）

Question

I am using Loopback 3.22 with loopback-connector-mysql 5.3.1.

When i configure loopback to covert BIT(1) mysql column as boolean it always returns true

"isActive": {
  "type": "Boolean",
  "required": false,
  "length": null,
  "precision": 1,
  "scale": null,
  "mysql": {
    "columnName": "is_active",
    "dataType": "bit",
    "dataLength": null,
    "dataPrecision": 1,
    "dataScale": null,
    "nullable": "Y"
  }
},

I have wasted so much time here, I even tried to use before save hooks, but column type validation kicks in before.

Making the column type Binary pushes the problem to the frontend.

Answer 1

这是LoopBack的MySQL连接器的已知错误，请参见以下GitHub问题： https : //github.com/strongloop/loopback-connector-mysql/issues/325

Answer 2

for anyone stuck here, I dirty patched MySQL.prototype.fromColumnValue , in order to get this thing working until it gets fixed

let MySQL = require("loopback-connector-mysql/lib/mysql").MySQL;

...
case 'Boolean':
        // extra case of Buffer(1)
        if (val instanceof Buffer && val.length === 1) {
          val = Boolean(val[0]);
        } else {
          // default case
          val = Boolean(val);
        }
...