refactor: constrain hashing to MigrationDirectory related types

Author: FGoessler

schema-engine/commands/src/migration_schema_cache.rs

@@ -1,3 +1,4 @@
+use std::borrow::Borrow;
 use std::collections::HashMap;
 use std::collections::hash_map::DefaultHasher;
 use std::hash::{Hash, Hasher};
@@ -22,7 +23,7 @@ impl MigrationSchemaCache {
     where
         F: FnOnce() -> Fut,
         Fut: std::future::Future<Output = Result<DatabaseSchema, E>>,
-        T: Hash,
+        T: Borrow<json_rpc::types::MigrationDirectory> + Hash,
     {
         let mut hasher = DefaultHasher::new();
         migration_directories.hash(&mut hasher);

schema-engine/connectors/schema-connector/src/migrations_directory.rs

@@ -7,7 +7,7 @@
 
 use crate::{checksum, ConnectorError, ConnectorResult};
 use json_rpc::types::MigrationLockfile;
-use std::{error::Error, fmt::Display};
+use std::{borrow::Borrow, error::Error, fmt::Display};
 use tracing_error::SpanTrace;
 use user_facing_errors::schema_engine::ProviderSwitchedError;
 
@@ -94,6 +94,12 @@ impl MigrationDirectory {
     }
 }
 
+impl Borrow<json_rpc::types::MigrationDirectory> for MigrationDirectory {
+    fn borrow(&self) -> &json_rpc::types::MigrationDirectory {
+        &self.0
+    }
+}
+
 /// Error while reading a migration script.
 #[derive(Debug)]
 pub struct ReadMigrationScriptError(pub(crate) std::io::Error, pub SpanTrace, pub String);