Thank you for this post! Most of the tutorials and documentation I find about Lambda resolvers involve creating new queries and mutations to use the Lambdas. However, I think it would be very helpful to use Lambda resolvers on queries and mutations that are generated automatically from the GraphQL schema by Amplify.
For example, let's say I have a schema that defines a Person with a phoneNumber field. Amplify automatically generates getPerson, createPerson, etc. How can I create a lambda resolver that is triggered on createPerson (for example to validate the phoneNumber)?
I tried many different approaches but I keep getting errors, it seems that Amplify doesn't play well with adding to or modifying automatically generated resolvers.
I know I can perform phoneNumber validation inside the VTL resolver, but what if I want to use a Node.js validation library for more concise and thorough data validation for all my default mutations?
Thanks again,
Santiago
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Hi Nader,
Thank you for this post! Most of the tutorials and documentation I find about Lambda resolvers involve creating new queries and mutations to use the Lambdas. However, I think it would be very helpful to use Lambda resolvers on queries and mutations that are generated automatically from the GraphQL schema by Amplify.
For example, let's say I have a schema that defines a Person with a phoneNumber field. Amplify automatically generates getPerson, createPerson, etc. How can I create a lambda resolver that is triggered on createPerson (for example to validate the phoneNumber)?
I tried many different approaches but I keep getting errors, it seems that Amplify doesn't play well with adding to or modifying automatically generated resolvers.
I know I can perform phoneNumber validation inside the VTL resolver, but what if I want to use a Node.js validation library for more concise and thorough data validation for all my default mutations?
Thanks again,
Santiago