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Define resolvers on type fields

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Returning resolvers from other resolvers isn't supported anymore. Since
we have a type system now, we define the resolvers in the object type
fields and pass an object with the previous result to them.
This commit is contained in:
Eugen Wissner
2020-05-27 23:18:35 +02:00
parent c06d0b8e95
commit d12577ae71
25 changed files with 534 additions and 516 deletions
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8
docs/tutorial/tutorial.lhs
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@ -44,8 +44,8 @@ First we build a GraphQL schema.
> $ HashMap.singleton "hello"
> $ Field Nothing (Out.NamedScalarType string) mempty hello
>
> hello :: ActionT IO (Out.Value IO)
> hello = pure $ Out.String "it's me"
> hello :: ActionT IO Value
> hello = pure $ String "it's me"
This defines a simple schema with one type and one field, that resolves to a fixed value.
@ -79,10 +79,10 @@ For this example, we're going to be using time.
> $ HashMap.singleton "time"
> $ Field Nothing (Out.NamedScalarType string) mempty time
>
> time :: ActionT IO (Out.Value IO)
> time :: ActionT IO Value
> time = do
> t <- liftIO getCurrentTime
> pure $ Out.String $ Text.pack $ show t
> pure $ String $ Text.pack $ show t
This defines a simple schema with one type and one field,
which resolves to the current time.