Don't clobber the JSON MIME type.#22
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simple_datatables was preventing Rails from parsing POST messages with a JSON body. The reason was that Mime::Type.register will associate a symbol with a mime type for both content generation (outbound HTTP responses, for instance) and content parsing (inbound HTTP requests), so when the middleware retrieved the identifying symbol associated with the application/json datatype, it got back :datatables, which it ignored. Mime::Type.register_alias will associate the symbol with the mime type for content generation only, so parsing the JSON body into a parameters array still works.
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simple_datatableswas preventing Rails from parsing POST messages with a JSON body. The reason was thatMime::Type.registerwill associate a symbol with a mime type for both content generation (outbound HTTP responses, for instance) and content parsing (inbound HTTP requests), so when the middleware retrieved the identifying symbol associated with the application/json datatype, it got back :datatables, which it ignored.Mime::Type.register_aliaswill associate the symbol with the mime type for content generation only, so parsing the JSON body into a parameters array still works.