Use simpler, clearer error on invalid ids length

sanitiser/_ids.js

@@ -8,9 +8,7 @@ var ID_DELIM = ':';
 // id generally looks like 'geoname:4163334' (type:id)
 // so, both type and id are required fields.
 
-function errorMessage(fieldname, message) {
-  return message || 'invalid param \''+ fieldname + '\': text length, must be >0';
-}
+var lengthError = 'invalid param \'ids\': length must be >0';
 
 var formatError = function(input) {
   return 'id `' + input + 'is invalid: must be of the format type:id for ex: \'geoname:4163334\'';
@@ -28,7 +26,7 @@ function sanitize( raw, clean ){
   }
 
   if (!check.unemptyString( raw.ids )) {
-    messages.errors.push( errorMessage( 'ids' ));
+    messages.errors.push( lengthError);
     return messages;
   }
 
@@ -40,7 +38,7 @@ function sanitize( raw, clean ){
 
   // ensure all elements are valid non-empty strings
   if (!rawIds.every(check.unemptyString)) {
-      messages.errors.push( errorMessage('ids') );
+      messages.errors.push( lengthError );
   }
 
   // cycle through raw ids and set those which are valid

test/ciao/place/missing_id.coffee

@@ -24,7 +24,7 @@ json.features.should.be.instanceof Array
 
 #? expected errors
 should.exist json.geocoding.errors
-json.geocoding.errors.should.eql [ 'invalid param \'ids\': text length, must be >0' ]
+json.geocoding.errors.should.eql [ 'invalid param \'ids\': length must be >0' ]
 
 #? expected warnings
 should.not.exist json.geocoding.warnings

test/unit/sanitiser/_ids.js

@@ -10,9 +10,8 @@ var inputs = {
 var formatError = function(input) {
   return 'id `' + input + 'is invalid: must be of the format type:id for ex: \'geoname:4163334\'';
 };
-
-var defaultError = 'invalid param \'ids\': text length, must be >0',
-  defaultMissingTypeError = function(input) {
+var lengthError = 'invalid param \'ids\': length must be >0';
+var defaultMissingTypeError = function(input) {
     var type = input.split(delimiter)[0];
     return type + ' is invalid. It must be one of these values - [' + types.join(', ') + ']';
   };
@@ -26,7 +25,7 @@ module.exports.tests.invalid_ids = function(test, common) {
 
     var messages = sanitize(raw, clean);
 
-    t.equal(messages.errors[0], defaultError, 'ids length error returned');
+    t.equal(messages.errors[0], lengthError, 'ids length error returned');
     t.equal(clean.ids, undefined, 'ids unset in clean object');
     t.end();
   });

test/unit/sanitiser/place.js

@@ -74,7 +74,7 @@ module.exports.tests.invalid_params = function(test, common) {
   test('no params', function(t) {
     var req = { query: {} };
     sanitize( req, function(){
-      t.equal( req.errors[0], 'invalid param \'ids\': text length, must be >0', 'error for missing `ids` param');
+      t.equal( req.errors[0], 'invalid param \'ids\': length must be >0', 'error for missing `ids` param');
       t.deepEqual( req.warnings, [], 'no warnings' );
       t.end();
     });