如何在猫鼬模式中设置最小值大于0？

Question

我认为这是一个简单的问题，但我很困惑。 如何将最小值添加到 mongoose > 0？

var customer = new Schema({
  cash: {
    type: Number,
    minimum: 0
  }
});

此代码允许 0 值，但我想做 > 0

我知道，我能做到

var customer = new Schema({
      cash: {
        type: Number,
        minimum: 0
      },
      validate: {
        validator: function(value) {
          return value > 0;
        },
        message: 'cash need to be > 0'
      },
});

*现金是浮动的，并且可以非常小

但是太长了，有没有更简单的方法？

Answer 1

您可以在定义模式时指定最小值。

    var breakfastSchema = new Schema({
  eggs: {
    type: Number,
    min: [6, 'Too few eggs'],
    max: 12
  },
  bacon: {
    type: Number,
    required: [true, 'Why no bacon?']
  },
  drink: {
    type: String,
    enum: ['Coffee', 'Tea'],
    required: function() {
      return this.bacon > 3;
    }
  }
});
var Breakfast = db.model('Breakfast', breakfastSchema);

`

var badBreakfast = new Breakfast({
  eggs: 2,
  bacon: 0,
  drink: 'Milk'
});
var error = badBreakfast.validateSync();
assert.equal(error.errors['eggs'].message,
  'Too few eggs');
assert.ok(!error.errors['bacon']);
assert.equal(error.errors['drink'].message,
  '`Milk` is not a valid enum value for path `drink`.');

badBreakfast.bacon = 5;
badBreakfast.drink = null;

error = badBreakfast.validateSync();
assert.equal(error.errors['drink'].message, 'Path `drink` is required.');

badBreakfast.bacon = null;
error = badBreakfast.validateSync();
assert.equal(error.errors['bacon'].message, 'Why no bacon?');

Answer 2

http://mongoosejs.com/docs/api.html#schema-number-js

试试这个：

var customer = new Schema({
  cash: {
    type: Number,
    min: 1
  }
});

我假设你正在使用 mongoose.js？

Answer 3

你可以看到这个