所以我想在我的RoR应用程序中使用searchkick gem。我只是按照 github 页面上的自述文件进行操作。
https://github.com/ankane/searchkick
但是当我运行Product.reindex它抛出以下错误时：
Elasticsearch::Transport::Transport::Errors::BadRequest: [400] {"error":{"root_cause":[{"type":"illegal_argument_exception","reason":"The difference between max_gram and min_gram in NGram Tokenizer must be less than or equal to: [1] but was [49]. This limit can be set by changing the [index.max_ngram_diff] index level setting."}],"type":"illegal_argument_exception","reason":"The difference between max_gram and min_gram in NGram Tokenizer must be less than or equal to: [1] but was [49]. This limit can be set by changing the [index.max_ngram_diff] index level setting."},"status":400}
from /home/Hendrik/.rvm/gems/ruby-2.3.7/gems/elasticsearch-transport-1.0.6/lib/elasticsearch/transport/transport/base.rb:132:in `__raise_transport_error'
from /home/Hendrik/.rvm/gems/ruby-2.3.7/gems/elasticsearch-transport-1.0.6/lib/elasticsearch/transport/transport/base.rb:224:in `perform_request'
from /home/Hendrik/.rvm/gems/ruby-2.3.7/gems/elasticsearch-transport-1.0.6/lib/elasticsearch/transport/transport/http/faraday.rb:20:in `perform_request'
from /home/Hendrik/.rvm/gems/ruby-2.3.7/gems/elasticsearch-transport-1.0.6/lib/elasticsearch/transport/client.rb:111:in `perform_request'
from /home/Hendrik/.rvm/gems/ruby-2.3.7/gems/elasticsearch-api-1.0.6/lib/elasticsearch/api/namespace/common.rb:21:in `perform_request'
from /home/Hendrik/.rvm/gems/ruby-2.3.7/gems/elasticsearch-api-1.0.6/lib/elasticsearch/api/actions/indices/create.rb:77:in `create'
from /home/Hendrik/.rvm/gems/ruby-2.3.7/gems/searchkick-2.5.0/lib/searchkick/index.rb:14:in `create'
from /home/Hendrik/.rvm/gems/ruby-2.3.7/gems/searchkick-2.5.0/lib/searchkick/index.rb:184:in `create_index'
from /home/Hendrik/.rvm/gems/ruby-2.3.7/gems/searchkick-2.5.0/lib/searchkick/index.rb:233:in `reindex_scope'
from /home/Hendrik/.rvm/gems/ruby-2.3.7/gems/searchkick-2.5.0/lib/searchkick/model.rb:72:in `searchkick_reindex'
from (irb):5
from /home/Hendrik/.rvm/gems/ruby-2.3.7/gems/railties-4.1.16/lib/rails/commands/console.rb:90:in `start'
from /home/Hendrik/.rvm/gems/ruby-2.3.7/gems/railties-4.1.16/lib/rails/commands/console.rb:9:in `start'
from /home/Hendrik/.rvm/gems/ruby-2.3.7/gems/railties-4.1.16/lib/rails/commands/commands_tasks.rb:69:in `console'
from /home/Hendrik/.rvm/gems/ruby-2.3.7/gems/railties-4.1.16/lib/rails/commands/commands_tasks.rb:40:in `run_command!'
from /home/Hendrik/.rvm/gems/ruby-2.3.7/gems/railties-4.1.16/lib/rails/commands.rb:17:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
它说我可以在级别设置中更改max_gram、min_gram和max_ngram_diff的值。但是我不知道关卡设置是什么，也不知道在哪里可以找到它。
看起来您使用的是旧版本的 Searchkick。尝试升级到最新版本。
bundle update searchkick