在 Waterline 中创建模型后设置默认值

Question

是否可以在创建模型实体后为属性设置默认值？

该属性之前不存在。

Answer 1

When a record is created, if no value was supplied, the record will be created with the specified defaultsTo value. The supplied value can also be a function that waterline will run while creating the record.

attributes: {
  phoneNumber: {
    type: 'string',
    defaultsTo: '111-222-3333'
  },
  orderNumber: {
    type: 'text',
    defaultsTo: function() {
      return uuid.v4();
    }
  }
}

根据您的用例，您可能还会发现 Lifecycle callbacks 有用。

Lifecycle callbacks are functions that are automagically called before or after certain model actions. For example, we sometimes use lifecycle callbacks to automatically hash a password before creating or updating an Account model.

在 Waterline 中创建模型后设置默认值

Set a default value after the model was created in Waterline

sails.js

waterline