在Meteor AutoForm SimpleSchema中验证日期值 [英] Validate date values in Meteor AutoForm SimpleSchema

问题描述

我有以下架构:

Dates.attachSchema(new SimpleSchema({
    description: {
        type: String,
        label: "Description",
        max: 50
    },
    start: {
        type: Date,
        autoform: {
            afFieldInput: {
                type: "bootstrap-datepicker"
            }
        }
    },
    end: {
        type: Date,
        autoform: {
            afFieldInput: {
                type: "bootstrap-datepicker"
            }
        }
    }
}));

如何确认end日期不在start之前?我正在使用MomentJS处理日期类型，但是我的主要问题是如何访问custom函数中的其他属性.

How can I validate that the end date is not before start? I am using MomentJS to handle date types, however my main problem is how I can access other attributes in the custom function.

例如:

end: {
   type: Date,
   autoform: {
       afFieldInput: {
           type: "bootstrap-datepicker"
       }
   },
   custom: function() {
       if (moment(this.value).isBefore(start)) return "badDate";
   }
}

如何访问start?

此外，如何验证start + end日期组合是否为唯一，这意味着数据库中没有保存与start和日期?

Furthermore, how can I validate if the start + end date combination is unique, meaning there is no document saved in my database which has the exact same start and end date?

推荐答案

对于域间通信，您可以执行以下操作:

For the inter-field communication, you can do:

end: {
  type: Date,
  autoform: {
    afFieldInput: {
      type: "bootstrap-datepicker"
    }
  },
  custom: function() {
    // get a reference to the fields
    var start = this.field('start');
    var end = this;
    // Make sure the fields are set so that .value is not undefined
    if (start.isSet && end.isSet) {
      if (moment(end.value).isBefore(start.value)) return "badDate";
    }
  }
}

您当然应该先声明badDate错误

SimpleSchema.messages({
  badDate: 'End date must be after the start date.',
  notDateCombinationUnique: 'The start/end date combination must be unique'
})

关于唯一性，首先，简单模式本身不提供唯一性检查.您应该为此添加aldeed:collection2.

Regarding the uniqueness, first of all simple schema itself does not provide uniqueness check. You should add aldeed:collection2 for that.

此外，collection2只能检查单个字段的唯一性.要完成复合索引，您应该使用ensureIndex语法

Furthermore, collection2 is capable of checking only a single field uniqueness. To accomplish compound indexes, you should use the ensureIndex syntax

Dates._ensureIndex( { start: 1, end: 1 }, { unique: true } )

即使在此之后，您也将无法从表单上的此复合索引中看到错误，因为自动表单需要知道该错误存在.

Even after this, you will not be able to see the error from this compound index on your form because autoform needs to be aware that such error is existing.

AutoForm.hooks({
  NewDatesForm: { // Use whatever name you have given your form
    before: {
      method: function(doc) {
        var form = this;
        // clear the error that gets added on the previous error so the form can proceed the second time
        form.removeStickyValidationError('start');
        return doc;
      }
    },
    onSuccess: function(operation, result, template) {
      if (result) {
        // do whatever you want if the form submission is successful;
      }
    },
    onError: function(operation, error) {
      var form = this;
      if (error) {

        if (error.reason && error.reason.indexOf('duplicate key error')) {
          // We add this error to the first field so it shows up there
          form.addStickyValidationError('start', 'notDateCombinationUnique'); // of course you have added this message to your definition earlier on
          AutoForm.validateField(form.formId, 'start');
        }

      }
    }
  }
});

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