consolidate __relay_model_instance definitions

Summary:
The `"__relay_model_instance"` field is defined in several different places in the compiler code.

This diff defines it in `relay/oss/crates/docblock-shared/src/lib.rs` as the source of truth, where related fields also reside e.g. `RELAY_RESOLVER_MODEL_DIRECTIVE_NAME`.

Reviewed By: alunyov

Differential Revision: D51376238

fbshipit-source-id: 0b5c5481bc1500b4ebc166efcbe204722befb614

Author: monicatang

compiler/crates/docblock-shared/src/lib.rs

@@ -42,6 +42,9 @@ lazy_static! {
     pub static ref EDGE_TO_FIELD: StringKey = "edgeTo".intern();
     pub static ref DEPRECATED_FIELD: StringKey = "deprecated".intern();
     pub static ref LIVE_FIELD: StringKey = "live".intern();
+    // Using a longer name version for this "special" field
+    // help us avoid potential collision with product code (__self, __instance can be used for something else)
+    pub static ref RELAY_RESOLVER_MODEL_INSTANCE_FIELD: StringKey = "__relay_model_instance".intern();
     pub static ref ROOT_FRAGMENT_FIELD: StringKey = "rootFragment".intern();
     pub static ref OUTPUT_TYPE_FIELD: StringKey = "outputType".intern();
     pub static ref WEAK_FIELD: StringKey = "weak".intern();

compiler/crates/relay-docblock/src/ir.rs

@@ -30,6 +30,7 @@ use docblock_shared::KEY_RESOLVER_ID_FIELD;
 use docblock_shared::LIVE_ARGUMENT_NAME;
 use docblock_shared::RELAY_RESOLVER_DIRECTIVE_NAME;
 use docblock_shared::RELAY_RESOLVER_MODEL_DIRECTIVE_NAME;
+use docblock_shared::RELAY_RESOLVER_MODEL_INSTANCE_FIELD;
 use docblock_shared::RELAY_RESOLVER_SOURCE_HASH;
 use docblock_shared::RELAY_RESOLVER_SOURCE_HASH_VALUE;
 use docblock_shared::RELAY_RESOLVER_WEAK_OBJECT_DIRECTIVE;
@@ -84,7 +85,6 @@ lazy_static! {
     static ref DEPRECATED_RESOLVER_DIRECTIVE_NAME: DirectiveName =
         DirectiveName("deprecated".intern());
     static ref DEPRECATED_REASON_ARGUMENT_NAME: ArgumentName = ArgumentName("reason".intern());
-    static ref RESOLVER_MODEL_INSTANCE_FIELD_NAME: StringKey = "__relay_model_instance".intern();
     static ref MODEL_CUSTOM_SCALAR_TYPE_SUFFIX: StringKey = "Model".intern();
 }
 
@@ -1518,13 +1518,13 @@ fn get_root_fragment_for_object(
                 project_name
                     .generate_name_for_object_and_field(
                         object.unwrap().name.item.0,
-                        *RESOLVER_MODEL_INSTANCE_FIELD_NAME,
+                        *RELAY_RESOLVER_MODEL_INSTANCE_FIELD,
                     )
                     .intern(),
             )),
             generated: true,
             inject_fragment_data: Some(FragmentDataInjectionMode::Field(
-                *RESOLVER_MODEL_INSTANCE_FIELD_NAME,
+                *RELAY_RESOLVER_MODEL_INSTANCE_FIELD,
             )),
         })
     } else {
@@ -1556,7 +1556,7 @@ fn generate_model_instance_field(
     });
 
     FieldDefinition {
-        name: string_key_as_identifier(*RESOLVER_MODEL_INSTANCE_FIELD_NAME),
+        name: string_key_as_identifier(*RELAY_RESOLVER_MODEL_INSTANCE_FIELD),
         type_: TypeAnnotation::NonNull(Box::new(NonNullTypeAnnotation {
             span,
             type_: TypeAnnotation::Named(NamedTypeAnnotation {

compiler/crates/relay-transforms/src/generate_relay_resolvers_model_fragments.rs

@@ -11,6 +11,7 @@ use common::NamedItem;
 use common::WithLocation;
 use docblock_shared::ResolverSourceHash;
 use docblock_shared::RELAY_RESOLVER_MODEL_DIRECTIVE_NAME;
+use docblock_shared::RELAY_RESOLVER_MODEL_INSTANCE_FIELD;
 use docblock_shared::RELAY_RESOLVER_SOURCE_HASH;
 use docblock_shared::RELAY_RESOLVER_SOURCE_HASH_VALUE;
 use graphql_ir::associated_data_impl;
@@ -21,19 +22,10 @@ use graphql_ir::Program;
 use graphql_ir::ScalarField;
 use graphql_ir::Selection;
 use intern::string_key::Intern;
-use intern::string_key::StringKey;
-use lazy_static::lazy_static;
 use relay_config::ProjectName;
 use relay_config::SchemaConfig;
 use schema::Schema;
 
-lazy_static! {
-    // Using a longer name version for this "special" field
-    // help us avoid potential collision with product code (__self, __instance can be used for something else)
-    static ref RESOLVER_MODEL_INSTANCE_FIELD_NAME: StringKey =
-        "__relay_model_instance".intern();
-}
-
 /// Currently, this is a wrapper of the hash of the resolver source code.
 /// But we can change this `ArtifactSourceKeyData` to be an
 /// enum and also represent the `fragment` or `operation` names.
@@ -61,19 +53,19 @@ pub fn generate_relay_resolvers_model_fragments(
             let object_type = program.schema.get_type(object.name.item.0).unwrap();
             let model_instance_field_id = program
                 .schema
-                .named_field(object_type, *RESOLVER_MODEL_INSTANCE_FIELD_NAME)
+                .named_field(object_type, *RELAY_RESOLVER_MODEL_INSTANCE_FIELD)
                 .unwrap_or_else(|| {
                     panic!(
                         "Objects with directive @{} expected to have field `{}`.",
-                        *RELAY_RESOLVER_MODEL_DIRECTIVE_NAME, *RESOLVER_MODEL_INSTANCE_FIELD_NAME
+                        *RELAY_RESOLVER_MODEL_DIRECTIVE_NAME, *RELAY_RESOLVER_MODEL_INSTANCE_FIELD
                     )
                 });
 
             let model_fragment_name = FragmentDefinitionName(
                 project_name
                     .generate_name_for_object_and_field(
                         object.name.item.0,
-                        *RESOLVER_MODEL_INSTANCE_FIELD_NAME,
+                        *RELAY_RESOLVER_MODEL_INSTANCE_FIELD,
                     )
                     .intern(),
             );