Search Template with Sections?

gistfile1.java

## This works:

curl -X GET 'localhost:9200/_search/template' -d '{
  "template" : "{ \"size\": \"{{size}}\",  \"query\":{\"match_all\":{}}}",
  "params":{
    "size":1,
    "use_size": false
  }
}'


## Let's just add {{#use_size}} ... {{/use_size}} around "size" parameter.

curl -X GET 'localhost:9200/_search/template' -d '{
  "template" : "{ {{#use_size}} \"size\": \"{{size}}\", {{/use_size}}  \"query\":{\"match_all\":{}}}",
  "params":{
    "size":1,
    "use_size": false
  }
}'


{"error":"SearchPhaseExecutionException[Failed to execute phase [query], all shards failed; shardFailures {[ccMkzywSSfi-4ttibpHh9w][twitter][3]: ElasticsearchParseException[Failed to parse template]; nested: JsonParseException[Unexpected character ('{' (code 123)): was expecting either valid name character (for unquoted name) or double-quote (for quoted) to start field name\n at [Source: [B@2307886c; line: 1, column: 4]]; }{[ccMkzywSSfi-4ttibpHh9w][twitter][4]: ElasticsearchParseException[Failed to parse template]; nested: JsonParseException[Unexpected character ('{' (code 123)): was expecting either valid name character (for unquoted name) or double-quote (for quoted) to start field name\n at [Source: [B@438d7c6b; line: 1, column: 4]]; }{[ccMkzywSSfi-4ttibpHh9w][twitter][0]: ElasticsearchParseException[Failed to parse template]; nested: JsonParseException[Unexpected character ('{' (code 123)): was expecting either valid name character (for unquoted name) or double-quote (for quoted) to start field name\n at [Source: [B@bae166c; line: 1, column: 4]]; }{[ccMkzywSSfi-4ttibpHh9w][twitter][2]: ElasticsearchParseException[Failed to parse template]; nested: JsonParseException[Unexpected character ('{' (code 123)): was expecting either valid name character (for unquoted name) or double-quote (for quoted) to start field name\n at [Source: [B@52421271; line: 1, column: 4]]; }{[ccMkzywSSfi-4ttibpHh9w][twitter][1]: ElasticsearchParseException[Failed to parse template]; nested: JsonParseException[Unexpected character ('{' (code 123)): was expecting either valid name character (for unquoted name) or double-quote (for quoted) to start field name\n at [Source: [B@6fc8e2e7; line: 1, column: 4]]; }]","status":400}