Using different language analyzers with ngram Analyzer in one mapping in Elasticsearch - elasticsearch

Question

i want to use english and german custom analyzers together with other analyzers for example ngram. Is the following mapping correct? i am getting error for german analyzer. [unknown setting [index.filter.german_stop.type]. i searched but i did not find any information about using multiple language analyzers in custom type. Is it possible to use language specific ngram-filter?
PUT test {
"settings": {
"analysis": {
"analyzer": {
"english_analyzer": {
"type": "custom",
"filter": [
"lowercase",
"english_stop",
"ngram_filter_en"
],
"tokenizer": "whitespace"
}
},
"filter": {
"english_stop": {
"type": "stop"
},
"ngram_filter_en": {
"type": "edge_ngram",
"min_gram": 1,
"max_gram": 25
}
},
"german_analyzer" : {
"type" : "custom",
"filter" : [
"lowercase",
"german_stop",
"ngram_filter_de"
],
"tokenizer" : "whitespace"
}
},
"filter" : {
"german_stop" : {
"type" : "stop"
},
"ngram_filter_de" : {
"type" : "edge_ngram",
"min_ngram" : "1",
"max_gram" : 25
}
}
},
"mappings" : {
"dynamic" : true,
"properties": {
"content" : {
"tye" : "text",
"properties" : {
"en" : {
"type" : "text",
"analyzer" : "english_analyzer"
},
"de" : {
"type" : "text",
"analyzer" : "german_analyzer"
}
}
}
}

Answer 1

There are small syntax errors.
You have your last filter object outside the analysis context.
You cannot have same keys multiple times in a JSON.
So, below settings would help
{
"analysis": {
"analyzer": {
"english_analyzer": {
"type": "custom",
"filter": [
"lowercase",
"english_stop",
"ngram_filter_en"
],
"tokenizer": "whitespace"
}
},
"filter": {
"english_stop": {
"type": "stop"
},
"ngram_filter_en": {
"type": "edge_ngram",
"min_gram": 1,
"max_gram": 25
},
"german_stop": {
"type": "stop"
},
"ngram_filter_de": {
"type": "edge_ngram",
"min_ngram": "1",
"max_gram": 25
}
},
"german_analyzer": {
"type": "custom",
"filter": [
"lowercase",
"german_stop",
"ngram_filter_de"
],
"tokenizer": "whitespace"
}
}
}
To understand the error in your mapping
{
"analysis": {
"analyzer": {
"filter": {
"english_stop": {
"type": "stop"
},
"ngram_filter_en": {
"type": "edge_ngram",
"min_gram": 1,
"max_gram": 25
}
},
"german_analyzer" : {
"type" : "custom",
"filter" : [
"lowercase",
"german_stop",
"ngram_filter_de"
],
"tokenizer" : "whitespace"
}
},
"filter" : {//**This is outside analysis, you cannot simply add another filter key inside analysis, so you can merge both as above**
"german_stop" : {
"type" : "stop"
},
"ngram_filter_de" : {
"type" : "edge_ngram",
"min_ngram" : "1",
"max_gram" : 25
}
}