CODEWITHSUNDEEP
mongodbaggregation-frameworkspring-data-mongodb
charlycou
charlycou

Reputation: 1998

Building aggregation operation over date using Spring and DateFromString

I have a collection with the following document :

{
  "observation": {
    "temporalExtent": [
      {
        "dateBeg": ISODate("2002-07-28T20:47:00.000+02:00"),
        "dateEnd": ISODate("2003-09-13T16:17:00.000+02:00")
      }
    ]
  }
}

I'm trying to make the following aggregation operation that should return the document above but I can't figure out what's wrong and why the document is not found.

db.collection.aggregate({
  "$match": {
    "observation.temporalExtent": {
      "$elemMatch": {
        "dateBeg": {
          "$gte": {
            "$dateFromString": {
              "dateString": "1892-01-05T23:50:39.000Z"
            }
          }
        }
      }
    }
  }
})

Any idea? You can play with this config here

Edit

The aggregation operation $dateFromStringis generated by Spring-data-mongodb DateOperators.DateFromString fromString(Object value) method. I'd like to know why I'm misusing this operator or another way to generate the same operation with $date or ISODate constructor as mentionned by @arsendavtyan and @mani.

Criteria.where("dateBeg")
  .lte(DateOperators.DateFromString.fromString(tmpExtent.getString("fromDate")))
  .lte(DateOperators.DateFromString.fromString(tmpExtent.getString("toDate")))

Upvotes: 1

Views: 1307

Answers (3)

charlycou
charlycou

Reputation: 1998

Here is the workaround that prevents the use of $dateFromString operator.

The String representation of the date are parsed into Instant

JSONObject tmpExtent = (JSONObject) item;
Instant from = Instant.parse(tmpExtent.getString("fromDate"));
Instant to = Instant.parse(tmpExtent.getString("toDate"));

The Criteria is constructed like:

Criteria.where("dateBeg").lte(from).lte(to)

And the query made to mongoDB looks like @arsendavtyan first solution.

{ "dateBeg" : { "$gte" : { "$date" : "2011-01-31T23:00:00.000Z"} , "$lte" : { "$date" : "2019-02-21T23:00:00.000Z"}}}

Upvotes: 0

Mani
Mani

Reputation: 1549

Please try running the 

db.collection.aggregate([{
  "$match": {
    "observation.temporalExtent": {
      "$elemMatch": {
        "dateBeg": {
          "$gte": new ISODate("1892-01-05T23:50:39.000Z")
        }
      }
    }
  }
}])

Try running using mongoshell or Robo Mongo , Mongoplayground throw error for newIsoDate()

Upvotes: 1

Arsen Davtyan
Arsen Davtyan

Reputation: 1957

Replace value.dateString with $date or just use ISODate instead of String

Option 1

db.collection.aggregate({
  "$match": {
    "observation.temporalExtent": {
      "$elemMatch": {
        "dateBeg": {
          "$gte": {
             "$date": "1892-01-05T23:50:39.000Z"
          }
        }
      }
    }
  }
})

Option 2

db.collection.aggregate({
  "$match": {
    "observation.temporalExtent": {
      "$elemMatch": {
        "dateBeg": {
          "$gte": ISODate("1892-01-05T23:50:39.000Z")
        }
      }
    }
  }
})

Upvotes: 1

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