How to specify a separate gridfs host? #68

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1. syntruth commented on Apr 3, 2018

   

   syntruth

   on Apr 3, 2018

   Last edited by syntruth

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   I had to figure this out for myself as well, since the code is a bit less than clear on how to do this, but it is possible, by giving the File and Chunk model a store_in hash.

   gridfs = Mongoid::GridFs
   gridfs.file_model.store_in database: 'db_name_here'
   gridfs.chunk_model.store_in database: 'db_name_here'
   

   This can then be confirmed with:

   gridfs.file_model.collection
   

   In my apps file model (in this case, for ActiveDirectory user photos), I have a convenience memoized set up method:

   def self.gridfs
     @gridfs ||= begin
       gridfs = Mongoid::GridFs
   
       gridfs.file_model.store_in database: AD.database_name
       gridfs.chunk_model.store_in database: AD.database_name
   
       gridfs
     end
   end
   

   So far, that seems to work, allowing me to store those files in a single database, but access them from 3 separate web-apps.
2. dblock

   added a commit that references this issue on Oct 18, 2026

   Expose GridFS queries and document storage configuration

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3. dblock commented on Oct 18, 2026

   

   dblock

   on Oct 18, 2026

   Contributor

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   Configure a named Mongoid client with the separate hosts/database, then select it on BOTH GridFS models during application initialization:

   gridfs = Mongoid::GridFs.namespace_for(:attachments)
   gridfs.file_model.store_in client: :gridfs
   gridfs.chunk_model.store_in client: :gridfs

   For database-only changes, use store_in database: "files_database" on both models. Mongoid 3/4 use named sessions (store_in session: :gridfs). This is shared model configuration, not a per-request switch. #89 documents the existing configuration API.

   Posted by an AI on behalf of @dblock.
4. dblock

   closed this as completedon Oct 18, 2026
5. dblock

   added 2 commits that reference this issue on Oct 18, 2026

   Expose GridFS queries and document storage configuration

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   88c1bf3

   Expose GridFS queries and document storage configuration

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   e40f1fb