esutils: json for "custom" field may contain unwanted entries
the textgrid-metadata field may contain lots of entries not relevant for tgsearch, e.g. https://textgridlab.org/1.0/tgcrud-public/rest/textgrid:3b6d5.0/metadata
these a are transformed to json and stored in elasticsearch, which creates json like
"tei:item": [
{
"": "die Verwendung für einen anderen als den unter Nr. 1 genannten Zweck, insbesondere die Nutzung zu kommerziellen Zwecken,",
"n": "3.1"
},
{
"": "das Anfertigen von Kopien oder Vervielfältigungen jeder Art und deren Weitergabe.",
"n": "3.2"
}
]
this is a problem for reindexing in elasticsearch > 7, as empty field names are not allowed:
"failures": [
{
"index": "textgrid-public-1687428527",
"type": "_doc",
"id": "3b6f6.0",
"cause": {
"type": "mapper_parsing_exception",
"reason": "failed to parse",
"caused_by": {
"type": "illegal_argument_exception",
"reason": "field name cannot be an empty string"
}
},
"status": 400
},
{
"index": "textgrid-public-1687428527",
"type": "_doc",
"id": "3b6d5.0",
"cause": {
"type": "mapper_parsing_exception",
"reason": "failed to parse",
"caused_by": {
"type": "illegal_argument_exception",
"reason": "field name cannot be an empty string"
}
},
"status": 400
}
]
we will just remove generation of json from custom field in esutils, as these entries are not searchable by tgsearch right now