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Where art thou, my error? @alloy - artsy.net h"ps:/ /github.com/alloy/graphql-finland

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S"ll early days

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S"ll early days

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!

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Errors vs Errors

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GraphQL Errors

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GraphQL Errors

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Excep&ons

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What’s the problem?

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Par$al data

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Par$al data

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Par$al data

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Par$al data

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Par$al data

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Communicate error

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Communicate error

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Possible solu*ons

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GraphQL Errors and reject en*re response h"ps://u.nu/atrh h"ps://u.nu/pjv-

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GraphQL Errors with metadata h"ps://u.nu/r5-2

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GraphQL Errors with metadata

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GraphQL Errors with metadata While convenient, the weakness of this approach is that the format of the valida6on error messages is not captured by your schema, making it bri;le to changes. Unless you maintain 6ght control of both server and client, you should keep the error responses as simple as possible. For muta6ons, it can be worthwhile defining these valida6on errors as first class ci6zens within your schema.

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Extra (muta*on) error fields h"ps://u.nu/th7y

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Extra (muta*on) error fields

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Extra (muta*on) error fields h"ps://u.nu/th7y

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Extra error field & type h"ps://u.nu/-3pw

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Extra error field & type

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Extra error field & type

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Extra error field & type h"ps://u.nu/-3pw Side-note: h"ps://u.nu/i0yg

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Recap •Use GraphQL •In context •All opera5ons •Explicit status

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Excep&ons as first-class ci+zens

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Excep&ons as first-class ci+zens

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Excep&ons as first-class ci+zens

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Excep&ons as first-class ci+zens

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Excep&ons as first-class ci+zens

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How we use it

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Types

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Types

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Types

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Types

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Types

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Types Side-note: h,ps://u.nu/c1ye

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Field naming ‘something’ or error

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Field naming

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Field naming

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Field naming

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Downside of union

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Downside of union Side-note: h,ps://u.nu/c29p

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Example of query usage

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Example of muta-on usage

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Final thoughts !

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Final thoughts ! @alloy

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Final thoughts !"#

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Final thoughts …to ‘REST’

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@alloy artsy.net h"ps:/ /github.com/ alloy/graphql-finland