extra params for dataloader function

[volbrene]

Hello, is it possible to append in the loadMany and load method a "optional" parameter? I need this for add a language code to the dataloader function, because there I need it.

Or what i the best way to do this?

Thanks

volbrene

[krislefeber]

I don't believe that would fit with the design of dataloader. The intention is that you already have an ID that ties to a specific value in some data store. Without knowing your data model, it's hard to suggest how to go about a solution. If you are just looking to cache some response, a simple memory cache may be a better solution. Otherwise, maybe you can do some filtering logic once you get the response back.

On Fri, Jan 24, 2020, 11:00 AM René Volbach notifications@github.com wrote:

Hello, is it possible to append in the loadMany and load method a "optional" parameter? I need this for add a language code to the dataloader function, because there I need it.

Or what i the best way to do this?

Thanks

volbrene

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[vijaych1209]

or you can pass your region as part of the key to the DataLoader and implement a custom cacheKeyFn.

[guy-baron1]

I am also interested in this, my use case is that I'm trying to prevent overfetching fields from my db, and in regular resolvers I can extract the needed fields from the request.

I can achieve this with regular resolvers but since the db call is in the dataloader I need to find a way to pass those required fields.

Any advice? I might just fork if I have no other choice

[vijaych1209]

I resolved this by using an object for data loader key like {'id': 1, 'param1': 'val1', 'param2': 'val2'} instead of just id's. When you do this make sure you overwrite your "cacheKeyFn"

/**

• Default key => key. Produces cache key for a given load key. Useful
• when objects are keys and two objects should be considered equivalent. */ cacheKeyFn?: (key: K) => C,

Good luck.

On Thu, Feb 18, 2021 at 3:39 PM guy-baron1 notifications@github.com wrote:

I am also interested in this, my use case is that I'm trying to prevent overfetching fields from my db, and in regular resolvers I can extract the needed fields from the request.

I can achieve this with regular resolvers but since the db call is in the dataloader I need to find a way to pass those required fields.

Any advice? I might just fork if I have no other choice

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