Queries with fragments don't work with Artemis v7

[paoloposo]

Bug description

After upgrading to version 7 in order to migrate my app to null-safety, I ran into an issue where my queries would fail. After some investigating I narrowed it down to the use of fragments in my queries.

I made a minimal working example: https://github.com/paoloposo/artemis_test

It uses the Pokemon sample API. There are two queries in the example that request the same data. One has all the fields directly in the query:

query withoutFragments {
    pokemon(name: "Blastoise") {
        id
        name
        height {
            minimum
            maximum
        }
        weight {
            minimum
            maximum
        }
        fleeRate
    }
}

The other one uses a fragment:

fragment PokemonDetails on Pokemon {
    id
    name
    height {
        minimum
        maximum
    }
    weight {
        minimum
        maximum
    }
    fleeRate
}

query withFragments {
    pokemon(name: "Blastoise") {
        ...PokemonDetails
    }
}

The first one, without the fragment, produces the expected result:

{pokemon: {id: UG9rZW1vbjowMDk=, name: Blastoise, height: {minimum: 1.4m, maximum: 1.8m}, weight: {minimum: 74.81kg, maximum: 96.19kg}, fleeRate: 0.05}}

The one with the fragment produces this, however:

{pokemon: null}

Specs

Artemis version: 7.1.1-beta.1

build.yaml:

```yaml targets: $default: sources: - lib/** - graphql/** builders: json_serializable: options: include_if_null: false artemis: options: # fragments_glob: graphql/fragments/*.graphql # this doesn't work either schema_mapping: - schema: graphql/schema.graphql queries_glob: graphql/operations/**.graphql output: lib/graphql/graphql_api.dart fragments_glob: graphql/fragments/*.graphql ```

Artemis output:

```bash Precompiling executable... Precompiled build_runner:build_runner. [INFO] Entrypoint:Generating build script... [INFO] Entrypoint:Generating build script completed, took 298ms [INFO] Bootstrap:Precompiling build script...... [INFO] Bootstrap:Precompiling build script... completed, took 6.2s [FINE] Bootstrap:Core package locations file does not exist [WARNING] build.fallback: The package `artemis_test` does not include some required sources in any of its targets (see their build.yaml file). The missing sources are: - $package$ [INFO] BuildDefinition:Initializing inputs [INFO] BuildDefinition:Building new asset graph... [INFO] BuildDefinition:Building new asset graph completed, took 589ms [INFO] BuildDefinition:Checking for unexpected pre-existing outputs.... [INFO] BuildDefinition:Checking for unexpected pre-existing outputs. completed, took 1ms [INFO] Build:Running build... [FINE] artemis:artemis on lib/$lib$:-> Class [FINE] artemis:artemis on lib/$lib$:┌ [TypeName(name:r'withFragments'), TypeName(name:r'Query')][Query][null null] () [FINE] artemis:artemis on lib/$lib$:| [TypeName(name:r'withFragments'), TypeName(name:r'Query')][Query][ClassName(name:r'Pokemon') ClassPropertyName(name:r'pokemon')] -> WithFragments$Query$Pokemon? [FINE] artemis:artemis on lib/$lib$:| -> Class [FINE] artemis:artemis on lib/$lib$:| ┌ [TypeName(name:r'withFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon')][Pokemon][null null] () [FINE] artemis:artemis on lib/$lib$:| | [TypeName(name:r'withFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon')]: ... expanding PokemonDetails [FINE] artemis:artemis on lib/$lib$:| | | -> Class [FINE] artemis:artemis on lib/$lib$:| | | ┌ [TypeName(name:r'withFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon'), FragmentName(name:r'PokemonDetailsMixin'), ClassName(name:r'PokemonDimension')][PokemonDimension][null null] () [FINE] artemis:artemis on lib/$lib$:| | | | [TypeName(name:r'withFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon'), FragmentName(name:r'PokemonDetailsMixin'), ClassName(name:r'PokemonDimension')][PokemonDimension][ClassName(name:r'String') ClassPropertyName(name:r'minimum')] -> String? [FINE] artemis:artemis on lib/$lib$:| | | | [TypeName(name:r'withFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon'), FragmentName(name:r'PokemonDetailsMixin'), ClassName(name:r'PokemonDimension')][PokemonDimension][ClassName(name:r'String') ClassPropertyName(name:r'maximum')] -> String? [FINE] artemis:artemis on lib/$lib$:| | | └ [TypeName(name:r'withFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon'), FragmentName(name:r'PokemonDetailsMixin'), ClassName(name:r'PokemonDimension')][PokemonDimension][null null] () [FINE] artemis:artemis on lib/$lib$:| | | <- Generated class WithFragments$Query$Pokemon$PokemonDetailsMixin$PokemonDimension. [FINE] artemis:artemis on lib/$lib$:| | | -> Class [FINE] artemis:artemis on lib/$lib$:| | | ┌ [TypeName(name:r'withFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon'), FragmentName(name:r'PokemonDetailsMixin'), ClassName(name:r'PokemonDimension')][PokemonDimension][null null] () [FINE] artemis:artemis on lib/$lib$:| | | | [TypeName(name:r'withFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon'), FragmentName(name:r'PokemonDetailsMixin'), ClassName(name:r'PokemonDimension')][PokemonDimension][ClassName(name:r'String') ClassPropertyName(name:r'minimum')] -> String? [FINE] artemis:artemis on lib/$lib$:| | | | [TypeName(name:r'withFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon'), FragmentName(name:r'PokemonDetailsMixin'), ClassName(name:r'PokemonDimension')][PokemonDimension][ClassName(name:r'String') ClassPropertyName(name:r'maximum')] -> String? [FINE] artemis:artemis on lib/$lib$:| | | └ [TypeName(name:r'withFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon'), FragmentName(name:r'PokemonDetailsMixin'), ClassName(name:r'PokemonDimension')][PokemonDimension][null null] () [FINE] artemis:artemis on lib/$lib$:| | | <- Generated class WithFragments$Query$Pokemon$PokemonDetailsMixin$PokemonDimension. [FINE] artemis:artemis on lib/$lib$:| └ [TypeName(name:r'withFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon')][Pokemon][null null] () [FINE] artemis:artemis on lib/$lib$:| <- Generated class WithFragments$Query$Pokemon. [FINE] artemis:artemis on lib/$lib$:└ [TypeName(name:r'withFragments'), TypeName(name:r'Query')][Query][null null] () [FINE] artemis:artemis on lib/$lib$:<- Generated class WithFragments$Query. [FINE] artemis:artemis on lib/$lib$:-> Fragment [FINE] artemis:artemis on lib/$lib$:┌ [][PokemonDetails] [FINE] artemis:artemis on lib/$lib$:| [FragmentName(name:r'PokemonDetails')][Pokemon][ClassName(name:r'ID') ClassPropertyName(name:r'id')] -> String [FINE] artemis:artemis on lib/$lib$:| [FragmentName(name:r'PokemonDetails')][Pokemon][ClassName(name:r'String') ClassPropertyName(name:r'name')] -> String? [FINE] artemis:artemis on lib/$lib$:| [FragmentName(name:r'PokemonDetails')][Pokemon][ClassName(name:r'PokemonDimension') ClassPropertyName(name:r'height')] -> PokemonDetailsMixin$PokemonDimension? [FINE] artemis:artemis on lib/$lib$:| -> Class [FINE] artemis:artemis on lib/$lib$:| ┌ [FragmentName(name:r'PokemonDetails'), ClassName(name:r'PokemonDimension')][PokemonDimension][null null] () [FINE] artemis:artemis on lib/$lib$:| | [FragmentName(name:r'PokemonDetails'), ClassName(name:r'PokemonDimension')][PokemonDimension][ClassName(name:r'String') ClassPropertyName(name:r'minimum')] -> String? [FINE] artemis:artemis on lib/$lib$:| | [FragmentName(name:r'PokemonDetails'), ClassName(name:r'PokemonDimension')][PokemonDimension][ClassName(name:r'String') ClassPropertyName(name:r'maximum')] -> String? [FINE] artemis:artemis on lib/$lib$:| └ [FragmentName(name:r'PokemonDetails'), ClassName(name:r'PokemonDimension')][PokemonDimension][null null] () [FINE] artemis:artemis on lib/$lib$:| <- Generated class PokemonDetailsMixin$PokemonDimension. [FINE] artemis:artemis on lib/$lib$:| [FragmentName(name:r'PokemonDetails')][Pokemon][ClassName(name:r'PokemonDimension') ClassPropertyName(name:r'weight')] -> PokemonDetailsMixin$PokemonDimension? [FINE] artemis:artemis on lib/$lib$:| -> Class [FINE] artemis:artemis on lib/$lib$:| ┌ [FragmentName(name:r'PokemonDetails'), ClassName(name:r'PokemonDimension')][PokemonDimension][null null] () [FINE] artemis:artemis on lib/$lib$:| | [FragmentName(name:r'PokemonDetails'), ClassName(name:r'PokemonDimension')][PokemonDimension][ClassName(name:r'String') ClassPropertyName(name:r'minimum')] -> String? [FINE] artemis:artemis on lib/$lib$:| | [FragmentName(name:r'PokemonDetails'), ClassName(name:r'PokemonDimension')][PokemonDimension][ClassName(name:r'String') ClassPropertyName(name:r'maximum')] -> String? [FINE] artemis:artemis on lib/$lib$:| └ [FragmentName(name:r'PokemonDetails'), ClassName(name:r'PokemonDimension')][PokemonDimension][null null] () [FINE] artemis:artemis on lib/$lib$:| <- Generated class PokemonDetailsMixin$PokemonDimension. [FINE] artemis:artemis on lib/$lib$:| [FragmentName(name:r'PokemonDetails')][Pokemon][ClassName(name:r'Float') ClassPropertyName(name:r'fleeRate')] -> double? [FINE] artemis:artemis on lib/$lib$:└ [][PokemonDetails] [FINE] artemis:artemis on lib/$lib$:<- Generated fragment PokemonDetailsMixin. [FINE] artemis:artemis on lib/$lib$:-> Class [FINE] artemis:artemis on lib/$lib$:┌ [TypeName(name:r'withoutFragments'), TypeName(name:r'Query')][Query][null null] () [FINE] artemis:artemis on lib/$lib$:| [TypeName(name:r'withoutFragments'), TypeName(name:r'Query')][Query][ClassName(name:r'Pokemon') ClassPropertyName(name:r'pokemon')] -> WithoutFragments$Query$Pokemon? [FINE] artemis:artemis on lib/$lib$:| -> Class [FINE] artemis:artemis on lib/$lib$:| ┌ [TypeName(name:r'withoutFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon')][Pokemon][null null] () [FINE] artemis:artemis on lib/$lib$:| | [TypeName(name:r'withoutFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon')][Pokemon][ClassName(name:r'ID') ClassPropertyName(name:r'id')] -> String [FINE] artemis:artemis on lib/$lib$:| | [TypeName(name:r'withoutFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon')][Pokemon][ClassName(name:r'String') ClassPropertyName(name:r'name')] -> String? [FINE] artemis:artemis on lib/$lib$:| | [TypeName(name:r'withoutFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon')][Pokemon][ClassName(name:r'PokemonDimension') ClassPropertyName(name:r'height')] -> WithoutFragments$Query$Pokemon$PokemonDimension? [FINE] artemis:artemis on lib/$lib$:| | -> Class [FINE] artemis:artemis on lib/$lib$:| | ┌ [TypeName(name:r'withoutFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon'), ClassName(name:r'PokemonDimension')][PokemonDimension][null null] () [FINE] artemis:artemis on lib/$lib$:| | | [TypeName(name:r'withoutFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon'), ClassName(name:r'PokemonDimension')][PokemonDimension][ClassName(name:r'String') ClassPropertyName(name:r'minimum')] -> String? [FINE] artemis:artemis on lib/$lib$:| | | [TypeName(name:r'withoutFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon'), ClassName(name:r'PokemonDimension')][PokemonDimension][ClassName(name:r'String') ClassPropertyName(name:r'maximum')] -> String? [FINE] artemis:artemis on lib/$lib$:| | └ [TypeName(name:r'withoutFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon'), ClassName(name:r'PokemonDimension')][PokemonDimension][null null] () [FINE] artemis:artemis on lib/$lib$:| | <- Generated class WithoutFragments$Query$Pokemon$PokemonDimension. [FINE] artemis:artemis on lib/$lib$:| | [TypeName(name:r'withoutFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon')][Pokemon][ClassName(name:r'PokemonDimension') ClassPropertyName(name:r'weight')] -> WithoutFragments$Query$Pokemon$PokemonDimension? [FINE] artemis:artemis on lib/$lib$:| | -> Class [FINE] artemis:artemis on lib/$lib$:| | ┌ [TypeName(name:r'withoutFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon'), ClassName(name:r'PokemonDimension')][PokemonDimension][null null] () [FINE] artemis:artemis on lib/$lib$:| | | [TypeName(name:r'withoutFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon'), ClassName(name:r'PokemonDimension')][PokemonDimension][ClassName(name:r'String') ClassPropertyName(name:r'minimum')] -> String? [FINE] artemis:artemis on lib/$lib$:| | | [TypeName(name:r'withoutFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon'), ClassName(name:r'PokemonDimension')][PokemonDimension][ClassName(name:r'String') ClassPropertyName(name:r'maximum')] -> String? [FINE] artemis:artemis on lib/$lib$:| | └ [TypeName(name:r'withoutFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon'), ClassName(name:r'PokemonDimension')][PokemonDimension][null null] () [FINE] artemis:artemis on lib/$lib$:| | <- Generated class WithoutFragments$Query$Pokemon$PokemonDimension. [FINE] artemis:artemis on lib/$lib$:| | [TypeName(name:r'withoutFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon')][Pokemon][ClassName(name:r'Float') ClassPropertyName(name:r'fleeRate')] -> double? [FINE] artemis:artemis on lib/$lib$:| └ [TypeName(name:r'withoutFragments'), TypeName(name:r'Query'), ClassName(name:r'Pokemon')][Pokemon][null null] () [FINE] artemis:artemis on lib/$lib$:| <- Generated class WithoutFragments$Query$Pokemon. [FINE] artemis:artemis on lib/$lib$:└ [TypeName(name:r'withoutFragments'), TypeName(name:r'Query')][Query][null null] () [FINE] artemis:artemis on lib/$lib$:<- Generated class WithoutFragments$Query. [INFO] build_resolvers:Generating SDK summary... [INFO] Heartbeat:3.0s elapsed, 1/4 actions completed. [INFO] build_resolvers:Generating SDK summary completed, took 2.7s [INFO] Heartbeat:4.2s elapsed, 3/4 actions completed. [FINE] json_serializable:json_serializable on lib/graphql/graphql_api.graphql.dart:Running JsonSerializableGenerator - 1 of 2 [FINE] json_serializable:json_serializable on lib/graphql/graphql_api.graphql.dart:Running JsonLiteralGenerator - 2 of 2 [INFO] Build:Running build completed, took 4.5s [INFO] Build:Caching finalized dependency graph... [INFO] Build:Caching finalized dependency graph completed, took 19ms [INFO] Build:Succeeded after 4.5s with 4 outputs (8 actions) ```

[vasilich6107]

@paoloposo set fetchPolicy: FetchPolicy.noCache and everything will work

[vasilich6107]

@paoloposo it seems that you are missing store setup for cache https://github.com/zino-app/graphql-flutter/tree/beta/packages/graphql#persistence

[vasilich6107]

If you look on your example the error is somewhere in cache cause two queries are identical

the difference is the suource that graphql tries to get results

[samuelchanx]

@vasilich6107 May I know how to fix this issue? Using fragments in Artemis suddenly return null when used with flutter_graphql, unless I use FetchPolicy.noCache

https://github.com/zino-hofmann/graphql-flutter/issues/994

[pdkcoder]

Is this fixed? I'm using ^7.8.0-beta and fragment is still not working

[vasilich6107]

@thphuc If you have an issue create new one with reply

[pdkcoder]

Hi @vasilich6107 thanks for your quick response. Yes, I have to use FetchPolicy.noCache to make my fragment work, like @samuelchanx mentioned

[baconcheese113]

See #393 for the solution