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elasticsearch-dslelasticsearch-dsl-py

Exception when trying to use Date in elasticsearch-dsl.py persistence api

I am trying to use persistence API, using elasticsearch-dsl version 6.2.1 as follow:

class MyClass(Document):
    start = Date(format='dd-MM-yyyy HH:mm:ss:SSS')
    stop = Date(format='dd-MM-yyyy HH:mm:ss:SSS')

When I call MyClass.init() I see (through Kibana) that indeed the mapping is as I expected:

    "start": {
      "type": "date",
      "format": "dd-MM-yyyy HH:mm:ss:SSS"
    },
    "stop": {
      "type": "date",
      "format": "dd-MM-yyyy HH:mm:ss:SSS"
    }

I have variable my_instance which is an instance of MyClass. my_instance.start and my_instance.stop hold strings like '15-06-2018 02:54:05:382'

When I call my_instance.save() I get the following exception:

elasticsearch_dsl.exceptions.ValidationException: {'start': 
[ValidationException("Could not parse date from the value ('15-06-2018 
02:54:05:281')", ValueError('Unknown string format:', '15-06-2018 
02:54:05:281'))], 'stop': [ValidationException("Could not parse date from the 
value ('15-06-2018 02:54:05:382')", ValueError('Unknown string format:', '15- 
06-2018 02:54:05:382'))]}

What am I doing wrong?

Solution

  • Unfortunately elasticsearch-dsl currently only supports dates in ISO format. If you want to use any other format you need to specify the (de) serialization yourself.