While reading the Tire doc, I was under the impression that you should use either mapping or to_indexed_json methods, since (my understanding was..) the mapping is used to feed the to_indexed_json.
在阅读Tire文档时，我的印象是你应该使用map或to_indexed_json方法，因为（我的理解是......）映射用于提供to_indexed_json。
The problem is, that I found some tutorials where both are used. WHY?
问题是，我发现了一些使用它们的教程。为什么？
Basically, my app works right now with the to_indexed_json but I can't figure out how to set the boost value of some of the attributes (hence the reason I started looking at mapping) and I was wondering if using both would create some conflicts.
基本上，我的应用程序现在使用to_indexed_json，但我无法弄清楚如何设置某些属性的提升值（因此我开始查看映射的原因），我想知道是否使用两者会产生一些冲突。
1 个解决方案
#1
50
While the mapping and to_indexed_json methods are related, they serve two different purposes, in fact.
虽然映射和to_indexed_json方法是相关的，但实际上它们有两个不同的用途。
The purpose of the mapping method is to define mapping for the document properties within an index. You may want to define certain property as "not_analyzed", so it is not broken into tokens, or set a specific analyzer for the property, or (as you mention) indexing time boost factor. You may also define multifield property, custom formats for date types, etc.
映射方法的目的是为索引中的文档属性定义映射。您可能希望将某些属性定义为“not_analyzed”，因此不会将其分解为标记，或者为属性设置特定的分析器，或者（如您所述）索引时间提升因子。您还可以定义多字段属性，日期类型的自定义格式等。
This mapping is then used eg. when Tire automatically creates an index for your model.
然后使用该映射，例如。当轮胎自动为您的模型创建索引时。
The purpose of the to_indexed_json method is to define a JSON serialization for your documents/models.
to_indexed_json方法的目的是为您的文档/模型定义JSON序列化。
The default to_indexed_json method does use your mapping definition, to use only properties defined in the mapping — on a basis that if you care enough to define the mapping, by default Tire indexes only properties with defined mapping.
默认的to_indexed_json方法确实使用您的映射定义，仅使用映射中定义的属性 - 基于如果您足够关注定义映射，默认情况下Tire仅索引具有已定义映射的属性。
Now, when you want a tight grip on how your model is in fact serialized into JSON for elasticsearch, you just define your own to_indexed_json methods (as the README instructs).
现在，当您想要紧紧抓住模型实际上如何序列化为弹性搜索的JSON时，您只需定义自己的to_indexed_json方法（如README指示）。
This custom MyModel#to_indexed_method usually does not care about mapping definition, and builds the JSON serialization from scratch (by leveraging ActiveRecord's to_json, using a JSON builder such as jbuilder, or just building a plain old Hash and calling Hash#to_json).
这个自定义MyModel＃to_indexed_method通常不关心映射定义，并且从头开始构建JSON序列化（通过利用ActiveRecord的to_json，使用jbuilder等JSON构建器，或者只构建一个普通的旧Hash并调用Hash＃to_json）。
So, to answer the last part of your question, using both mapping and to_indexed_json will absolutely not create any conflicts, and is in fact required to use advanced features in elasticsearch.
因此，要回答问题的最后部分，使用mapping和to_indexed_json绝对不会产生任何冲突，实际上需要在elasticsearch中使用高级功能。
To sum up:
总结一下：
- You use the
mappingmethod to define the mapping for your models for the search engine - 您可以使用映射方法为搜索引擎定义模型的映射
- You use a custom
to_indexed_jsonmethod to define how the search engine sees your documents/models. - 您可以使用自定义to_indexed_json方法来定义搜索引擎查看文档/模型的方式。
#1
50
While the mapping and to_indexed_json methods are related, they serve two different purposes, in fact.
虽然映射和to_indexed_json方法是相关的，但实际上它们有两个不同的用途。
The purpose of the mapping method is to define mapping for the document properties within an index. You may want to define certain property as "not_analyzed", so it is not broken into tokens, or set a specific analyzer for the property, or (as you mention) indexing time boost factor. You may also define multifield property, custom formats for date types, etc.
映射方法的目的是为索引中的文档属性定义映射。您可能希望将某些属性定义为“not_analyzed”，因此不会将其分解为标记，或者为属性设置特定的分析器，或者（如您所述）索引时间提升因子。您还可以定义多字段属性，日期类型的自定义格式等。
This mapping is then used eg. when Tire automatically creates an index for your model.
然后使用该映射，例如。当轮胎自动为您的模型创建索引时。
The purpose of the to_indexed_json method is to define a JSON serialization for your documents/models.
to_indexed_json方法的目的是为您的文档/模型定义JSON序列化。
The default to_indexed_json method does use your mapping definition, to use only properties defined in the mapping — on a basis that if you care enough to define the mapping, by default Tire indexes only properties with defined mapping.
默认的to_indexed_json方法确实使用您的映射定义，仅使用映射中定义的属性 - 基于如果您足够关注定义映射，默认情况下Tire仅索引具有已定义映射的属性。
Now, when you want a tight grip on how your model is in fact serialized into JSON for elasticsearch, you just define your own to_indexed_json methods (as the README instructs).
现在，当您想要紧紧抓住模型实际上如何序列化为弹性搜索的JSON时，您只需定义自己的to_indexed_json方法（如README指示）。
This custom MyModel#to_indexed_method usually does not care about mapping definition, and builds the JSON serialization from scratch (by leveraging ActiveRecord's to_json, using a JSON builder such as jbuilder, or just building a plain old Hash and calling Hash#to_json).
这个自定义MyModel＃to_indexed_method通常不关心映射定义，并且从头开始构建JSON序列化（通过利用ActiveRecord的to_json，使用jbuilder等JSON构建器，或者只构建一个普通的旧Hash并调用Hash＃to_json）。
So, to answer the last part of your question, using both mapping and to_indexed_json will absolutely not create any conflicts, and is in fact required to use advanced features in elasticsearch.
因此，要回答问题的最后部分，使用mapping和to_indexed_json绝对不会产生任何冲突，实际上需要在elasticsearch中使用高级功能。
To sum up:
总结一下：
- You use the
mappingmethod to define the mapping for your models for the search engine - 您可以使用映射方法为搜索引擎定义模型的映射
- You use a custom
to_indexed_jsonmethod to define how the search engine sees your documents/models. - 您可以使用自定义to_indexed_json方法来定义搜索引擎查看文档/模型的方式。