use upsert collection instead of upserting every variable

backend/src/services/app-connection/railway/railway-connection-public-client.ts

@@ -75,7 +75,7 @@ class RailwayPublicClient {
   async send<T extends TRailwayResponse>(
     query: string,
     options: RailwaySendReqOptions,
-    variables: Record<string, string | Record<string, string>> = {},
+    variables: Record<string, unknown> = {},
     retryAttempt: number = 0
   ): Promise<T["data"] | undefined> {
     const body = {
@@ -117,6 +117,22 @@ class RailwayPublicClient {
     }
   }
 
+  async getDeployments(config: RailwaySendReqOptions, variables: { input: { serviceId: string; environmentId: string }, first?: number }) {
+    return await this.send<TRailwayResponse<{ deployments: { edges: { node: { id: string } }[] } }>>(
+      `query deployments($input: DeploymentListInput!, $first: Int) { deployments(first: $first, input: $input) { edges { node { id } } } }`,
+      config,
+      variables
+    );
+  }
+
+  async redeployDeployment(config: RailwaySendReqOptions, variables: { input: { deploymentId: string } }) {
+    return await this.send<TRailwayResponse<{ deploymentRedeploy: { id: string } }>>(
+      `mutation deploymentRedeploy($deploymentId: String!) { deploymentRedeploy(id: $deploymentId) { id } }`,
+      config,
+      { deploymentId: variables.input.deploymentId }
+    );
+  }
+
   async getSubscriptionType(config: RailwaySendReqOptions & { projectId: string }) {
     const res = await this.send(
       `query project($projectId: String!) { project(id: $projectId) { subscriptionType }}`,
@@ -213,7 +229,7 @@ class RailwayPublicClient {
 
   async deleteVariable(
     config: RailwaySendReqOptions,
-    variables: { input: { projectId: string; environmentId: string; name: string; serviceId?: string } }
+    variables: { input: { projectId: string; environmentId: string; name: string; skipDeploys?: boolean; serviceId?: string } }
   ) {
     await this.send<TRailwayResponse<{ variables: Record<string, string> }>>(
       `mutation variableDelete($input: VariableDeleteInput!) { variableDelete(input: $input) }`,
@@ -222,6 +238,17 @@ class RailwayPublicClient {
     );
   }
 
+  async upsertCollection(
+    config: RailwaySendReqOptions,
+    variables: { input: { projectId: string; environmentId: string; variables: Record<string, string>; skipDeploys?: boolean; serviceId?: string, replace?: boolean } }
+  ) {
+    return await this.send<TRailwayResponse<boolean>>(
+      `mutation variableCollectionUpsert($input: VariableCollectionUpsertInput!) { variableCollectionUpsert(input: $input) }`,
+      config,
+      variables,
+    );
+  }
+
   async upsertVariable(
     config: RailwaySendReqOptions,
     variables: { input: { projectId: string; environmentId: string; name: string; value: string; serviceId?: string } }

backend/src/services/secret-sync/railway/railway-sync-fns.ts

@@ -40,61 +40,63 @@ export const RailwaySyncFns = {
     }
   },
 
+  /**
+   * Syncs secrets to Railway and redeploys the service if needed.
+   * 
+   * Gets existing Railway vars, merges with new secrets (keeping Railway vars if deletion is disabled),
+   * then replaces every variable with the new values, if variable is not in the secretMap, it is deleted. 
+   * If there's a service, triggers a redeploy to pick up the changes.
+   */
   async syncSecrets(secretSync: TRailwaySyncWithCredentials, secretMap: TSecretMap) {
     const {
-      environment,
-      syncOptions: { disableSecretDeletion, keySchema }
+      syncOptions: { disableSecretDeletion }
     } = secretSync;
     const railwaySecrets = await this.getSecrets(secretSync);
     const config = secretSync.destinationConfig;
 
-    for await (const key of Object.keys(secretMap)) {
-      try {
-        const existing = railwaySecrets[key];
+    const railwaySecretsMap = Object.fromEntries(Object.entries(railwaySecrets).map(([key, secret]) => [key, secret.value]));
+    const secretMapMap = Object.fromEntries(Object.entries(secretMap).map(([key, secret]) => [key, secret.value]));
 
-        if (existing === undefined || existing.value !== secretMap[key].value) {
-          await RailwayPublicAPI.upsertVariable(secretSync.connection, {
-            input: {
-              projectId: config.projectId,
-              environmentId: config.environmentId,
-              serviceId: config.serviceId || undefined,
-              name: key,
-              value: secretMap[key].value ?? ""
-            }
-          });
-        }
-      } catch (error) {
-        throw new SecretSyncError({
-          error,
-          secretKey: key
-        });
+    const toReplace = disableSecretDeletion 
+      ? { ...railwaySecretsMap, ...secretMapMap }
+      : secretMapMap;
+
+    const upserted = await RailwayPublicAPI.upsertCollection(secretSync.connection, {
+      input: {
+        projectId: config.projectId,
+        environmentId: config.environmentId,
+        serviceId: config.serviceId || undefined,
+        skipDeploys: true,
+        variables: toReplace,
+        replace: true,
       }
-    }
+    });
 
-    if (disableSecretDeletion) return;
+    if (!upserted) throw new SecretSyncError({
+      message: "Failed to upsert secrets to Railway",
+    })
 
-    for await (const key of Object.keys(railwaySecrets)) {
-      try {
-        // eslint-disable-next-line no-continue
-        if (!matchesSchema(key, environment?.slug || "", keySchema)) continue;
+    if (!config.serviceId) return;
 
-        if (!secretMap[key]) {
-          await RailwayPublicAPI.deleteVariable(secretSync.connection, {
-            input: {
-              projectId: config.projectId,
-              environmentId: config.environmentId,
-              serviceId: config.serviceId || undefined,
-              name: key
-            }
-          });
-        }
-      } catch (error) {
-        throw new SecretSyncError({
-          error,
-          secretKey: key
-        });
+    const latestDeployment = await RailwayPublicAPI.getDeployments(secretSync.connection, {
+      input: {
+        serviceId: config.serviceId,
+        environmentId: config.environmentId
+      },
+      first: 1,
+    });
+
+    const latestDeploymentId = latestDeployment?.deployments.edges[0].node.id;
+
+    if (!latestDeploymentId) throw new SecretSyncError({
+      message: "Failed to get latest deployment from Railway",
+    })
+
+    await RailwayPublicAPI.redeployDeployment(secretSync.connection, {
+      input: {
+        deploymentId: latestDeploymentId
       }
-    }
+    });
   },
 
   async removeSecrets(secretSync: TRailwaySyncWithCredentials, secretMap: TSecretMap) {