Improve error messages in components (#27664)

improve error messages when printing a UDF path or module that is in a component other than the root.
also reduce usage of functions `as_root_udf_path` and `into_root_udf_path` which throw a system error when given a path that's not in the root component.

GitOrigin-RevId: 10689577d5fe4a10329d5f6a98ddb8299cd134ce

crates/application/src/cache/mod.rs

@@ -125,10 +125,9 @@ pub struct CacheKey {
 impl fmt::Debug for CacheKey {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         let mut builder = f.debug_struct("CacheKey");
-        if let Ok(p) = self.path.as_root_udf_path() {
-            builder.field("path", p);
-        }
         builder
+            .field("path", &self.path.udf_path)
+            .field("component", &self.path.component)
             .field("args", &self.args)
             .field("identity", &self.identity)
             .field("journal", &self.journal)

crates/application/src/lib.rs

@@ -1157,9 +1157,10 @@ impl<RT: Runtime> Application<RT> {
             })
         else {
             let missing_or_internal = format!(
-                "Could not find function for '{}'. Did you forget to run `npx convex dev` or `npx \
-                 convex deploy`?",
-                String::from(canonicalized_path.into_root_udf_path()?.strip())
+                "Could not find function for '{}'{}. Did you forget to run `npx convex dev` or \
+                 `npx convex deploy`?",
+                String::from(canonicalized_path.udf_path.strip()),
+                canonicalized_path.component.in_component_str(),
             );
             return Ok(Err(FunctionError {
                 error: RedactedJsError::from_js_error(

crates/application/src/tests/cron_jobs.rs

@@ -77,7 +77,7 @@ async fn create_cron_job(
         udf_path: "basic:insertObject".parse()?,
     };
     let cron_spec = CronSpec {
-        udf_path: path.as_root_udf_path()?.clone().canonicalize(),
+        udf_path: path.udf_path.clone().canonicalize(),
         udf_args: parse_udf_args(&path, vec![JsonValue::Object(map)])?,
         cron_schedule: CronSchedule::Interval { seconds: 60 },
     };

crates/common/src/components/component_path.rs

@@ -87,6 +87,17 @@ impl ComponentPath {
         path.push(name);
         Self { path }
     }
+
+    /// Returns a debug or error string to put immediately after something which
+    /// should be scoped to this component,
+    /// like `format!("'{udf_path}'{}", component_path.in_component_str())`.
+    pub fn in_component_str(&self) -> String {
+        if self.is_root() {
+            "".to_string()
+        } else {
+            format!(" in '{}'", String::from(self.clone()))
+        }
+    }
 }
 
 impl Deref for ComponentPath {

crates/common/src/components/function_paths.rs

@@ -26,11 +26,6 @@ pub struct ComponentFunctionPath {
 }
 
 impl ComponentFunctionPath {
-    pub fn as_root_udf_path(&self) -> anyhow::Result<&UdfPath> {
-        anyhow::ensure!(self.component.is_root());
-        Ok(&self.udf_path)
-    }
-
     pub fn into_root_udf_path(self) -> anyhow::Result<UdfPath> {
         anyhow::ensure!(self.component.is_root());
         Ok(self.udf_path)
@@ -97,11 +92,6 @@ pub struct CanonicalizedComponentFunctionPath {
 }
 
 impl CanonicalizedComponentFunctionPath {
-    pub fn as_root_udf_path(&self) -> anyhow::Result<&CanonicalizedUdfPath> {
-        anyhow::ensure!(self.component.is_root());
-        Ok(&self.udf_path)
-    }
-
     pub fn into_root_udf_path(self) -> anyhow::Result<CanonicalizedUdfPath> {
         anyhow::ensure!(self.component.is_root());
         Ok(self.udf_path)

crates/isolate/src/environment/helpers/validation.rs

@@ -131,9 +131,10 @@ pub async fn validate_schedule_args<RT: Runtime>(
                 "InvalidScheduledFunction",
                 format!(
                     "Attempted to schedule function, but no exported function {} found in the \
-                     file: {}. Did you forget to export it?",
+                     file: {}{}. Did you forget to export it?",
                     function_name,
-                    String::from(path.as_root_udf_path()?.module().clone()),
+                    String::from(path.udf_path.module().clone()),
+                    path.component.in_component_str(),
                 ),
             ));
         }
@@ -144,9 +145,10 @@ pub async fn validate_schedule_args<RT: Runtime>(
 
 fn missing_or_internal_error(path: &CanonicalizedComponentFunctionPath) -> anyhow::Result<String> {
     Ok(format!(
-        "Could not find public function for '{}'. Did you forget to run `npx convex dev` or `npx \
-         convex deploy`?",
-        String::from(path.as_root_udf_path()?.clone().strip())
+        "Could not find public function for '{}'{}. Did you forget to run `npx convex dev` or \
+         `npx convex deploy`?",
+        String::from(path.udf_path.clone().strip()),
+        path.component.in_component_str()
     ))
 }
 
@@ -414,8 +416,9 @@ impl ValidatedPathAndArgs {
                     },
                     None => {
                         anyhow::bail!(
-                            "No visibility found for analyzed function {}",
-                            path.as_root_udf_path()?
+                            "No visibility found for analyzed function {}{}",
+                            path.udf_path,
+                            path.component.in_component_str(),
                         );
                     },
                 },
@@ -424,8 +427,9 @@ impl ValidatedPathAndArgs {
         if expected_udf_type != analyzed_function.udf_type {
             anyhow::ensure!(path.component.is_root());
             return Ok(Err(JsError::from_message(format!(
-                "Trying to execute {} as {}, but it is defined as {}.",
-                path.as_root_udf_path()?,
+                "Trying to execute {}{} as {}, but it is defined as {}.",
+                path.udf_path,
+                path.component.in_component_str(),
                 expected_udf_type,
                 analyzed_function.udf_type
             ))));

crates/isolate/src/isolate2/runner.rs

@@ -486,7 +486,11 @@ async fn run_request<RT: Runtime>(
     query_journal: QueryJournal,
 ) -> anyhow::Result<UdfOutcome> {
     let (path, arguments, udf_server_version) = path_and_args.consume();
-    let udf_path = path.as_root_udf_path()?;
+    anyhow::ensure!(
+        path.component.is_root(),
+        "TODO: non-root components not supported yet"
+    );
+    let udf_path = &path.udf_path;
 
     // Spawn a separate Tokio thread to receive log lines.
     let (log_line_tx, log_line_rx) = oneshot::channel();

crates/isolate/src/test_helpers.rs

@@ -569,7 +569,7 @@ impl<RT: Runtime, P: Persistence + Clone> UdfTest<RT, P> {
             };
 
             self.database
-                .commit_with_write_source(tx, Some(canonicalized_path.into_root_udf_path()?.into()))
+                .commit_with_write_source(tx, Some(canonicalized_path.udf_path.into()))
                 .await?;
             Ok(outcome)
         }

crates/model/src/components/mod.rs

@@ -88,7 +88,11 @@ impl<'a, RT: Runtime> ComponentsModel<'a, RT> {
                     .ok_or_else(|| {
                         ErrorMetadata::bad_request(
                             "InvalidReference",
-                            format!("Module {:?} not found", udf_path.module()),
+                            format!(
+                                "Module {:?}{} not found",
+                                udf_path.module(),
+                                component_path.in_component_str()
+                            ),
                         )
                     })?;
                 let analyze_result = module_metadata