Better error logging (#86)

* Better error logging * Proper index counting
salsita · May 22, 2017 · af94e8f · af94e8f
1 parent 796d2a3
commit af94e8f
Showing 1 changed file with 24 additions and 1 deletion.
diff --git a/lib/db.js b/lib/db.js
@@ -35,7 +35,30 @@ export default (connection_string) => {
               : resolve(result)
           ))
         )
-      );
+      )
+      .catch(err => {
+        const { message, position } = err;
+        if (message && position >= 1) {
+          const endLineWrapIndexOf = string.indexOf('\n', position);
+          const endLineWrapPos = endLineWrapIndexOf >= 0 ? endLineWrapIndexOf : string.length;
+          const stringStart = string.substring(0, endLineWrapPos);
+          const stringEnd = string.substr(endLineWrapPos);
+          const startLineWrapPos = stringStart.lastIndexOf('\n') + 1;
+          const padding = ' '.repeat(position - startLineWrapPos - 1);
+          console.error(`Error executing:
+${stringStart}
+${padding}^^^^${stringEnd}
+
+${message}
+`);
+        } else {
+          console.error(`Error executing:
+${string}
+${err}
+`);
+        }
+        throw err;
+      });
 
   const select = string =>
     query(string)