add unique path and rls to apps

backend/migrations/20221203080006_apps_2.down.sql

@@ -0,0 +1 @@
+-- Add down migration script here

backend/migrations/20221203080006_apps_2.up.sql

@@ -0,0 +1,3 @@
+-- Add up migration script here
+ALTER TABLE app ADD CONSTRAINT unique_path_workspace_id UNIQUE (workspace_id, path);
+ALTER TABLE app ENABLE ROW LEVEL SECURITY;

backend/sqlx-data.json

@@ -1499,6 +1499,27 @@
     },
     "query": "SELECT app.id, app.path, app.summary, app.versions, app.policy,\n        app.extra_perms, app_version.value, \n        app_version.created_at, app_version.created_by from app, app_version \n        WHERE app_version.id = $1 AND app.id = app_version.flow_id AND app.workspace_id = $2"
   },
+  "5850e0c1f7dee98455027a4c0db6ccea0af2c58aee656ef43964b515de054888": {
+    "describe": {
+      "columns": [
+        {
+          "name": "exists",
+          "ordinal": 0,
+          "type_info": "Bool"
+        }
+      ],
+      "nullable": [
+        null
+      ],
+      "parameters": {
+        "Left": [
+          "Text",
+          "Text"
+        ]
+      }
+    },
+    "query": "SELECT EXISTS(SELECT 1 FROM app WHERE path = $1 AND workspace_id = $2)"
+  },
   "58efbf34ba014b4853ef20ae400929b57c1d9de4262189274badf100d29e0649": {
     "describe": {
       "columns": [

backend/windmill-api/openapi.yaml

@@ -2347,6 +2347,23 @@ paths:
                 items:
                   $ref: "#/components/schemas/ListableApp"
 
+  /w/{workspace}/apps/exists/{path}:
+    get:
+      summary: does an app exisst at path
+      operationId: existsApp
+      tags:
+        - app
+      parameters:
+        - $ref: "#/components/parameters/WorkspaceId"
+        - $ref: "#/components/parameters/Path"
+      responses:
+        "200":
+          description: app exists
+          content:
+            application/json:
+              schema:
+                type: boolean
+
   /w/{workspace}/apps/get/p/{path}:
     get:
       summary: get app by path
@@ -3260,7 +3277,7 @@ paths:
         - $ref: "#/components/parameters/Path"
       responses:
         "200":
-          description: schedule deleted
+          description: schedule exists
           content:
             application/json:
               schema:

backend/windmill-api/src/apps.rs

@@ -36,6 +36,7 @@ pub fn workspaced_service() -> Router {
         .route("/list", get(list_apps))
         .route("/get/p/*path", get(get_app))
         .route("/get/v/*id", get(get_app_by_id))
+        .route("/exists/*path", post(exists_app))
         .route("/update/*path", post(update_app))
         .route("/delete/*path", delete(delete_app))
         .route("/create", post(create_app))
@@ -540,6 +541,23 @@ async fn execute_component(
     Ok(uuid.to_string())
 }
 
+async fn exists_app(
+    Extension(db): Extension<DB>,
+    Path((w_id, path)): Path<(String, StripPath)>,
+) -> JsonResult<bool> {
+    let path = path.to_path();
+    let exists = sqlx::query_scalar!(
+        "SELECT EXISTS(SELECT 1 FROM app WHERE path = $1 AND workspace_id = $2)",
+        path,
+        w_id
+    )
+    .fetch_one(&db)
+    .await?
+    .unwrap_or(false);
+
+    Ok(Json(exists))
+}
+
 fn build_args(
     policy: Policy,
     path: String,