better error reporting on failed search

src/public/app/services/entrypoints.js

@@ -165,7 +165,7 @@ export default class Entrypoints extends Component {
         const response = await server.get('search/' + encodeURIComponent(searchText) + '?includeNoteContent=true&excludeArchived=true&fuzzyAttributeSearch=false');
 
         if (!response.success) {
-            toastService.showError("Search failed.", 3000);
+            toastService.showError("Search failed: " + response.message, 10000);
             return;
         }
 

src/routes/api/search.js

@@ -17,7 +17,8 @@ function searchNotes(req) {
 
     try {
         return {
-            success: true,
+            success: !searchContext.hasError(),
+            message: searchContext.getError(),
             count,
             results
         }

src/services/search/search_context.js

@@ -16,6 +16,14 @@ class SearchContext {
             this.error = error;
         }
     }
+
+    hasError() {
+        return !!this.error;
+    }
+
+    getError() {
+        return this.error;
+    }
 }
 
 module.exports = SearchContext;

src/services/search/services/parse.js

@@ -263,7 +263,13 @@ function getExpression(tokens, searchContext, level = 0) {
             i += 1;
 
             return new RelationWhereExp(relationName, parseNoteProperty());
-        } else {
+        }
+        else if (i < tokens.length - 2 && isOperator(tokens[i + 1].token)) {
+            searchContext.addError(`Relation can be compared only with property, e.g. ~relation.title=hello in ${context(i)}`);
+
+            return null;
+        }
+        else {
             return new AttributeExistsExp('relation', relationName, searchContext.fuzzyAttributeSearch);
         }
     }

src/services/search/services/search.js

@@ -73,6 +73,8 @@ function findNotesWithQuery(query, searchContext) {
         return [];
     }
 
+    searchContext.originalQuery = query;
+
     return utils.stopWatch(`Search with query "${query}"`, () => {
         const expression = parseQueryToExpression(query, searchContext);