diff --git a/src/postgrest.js b/src/postgrest.js
index 58e4432..9ce8460 100644
--- a/src/postgrest.js
+++ b/src/postgrest.js
@@ -162,29 +162,32 @@ export default (api_root, auth={}) => {
 			// Simply build query string by hand.
 			if (options.queries) {
 				// build the query string
-				let _query_string = options.queries.map(query => {
-					// prepare the query kv pair and optional operator
-					let k = query.label
-					let v = query.value
-					let op = query.op
-
-					// return early if v is empty
-					if (typeof v == 'undefined' || (!v && v !== 0))
-						return undefined
-
-					if (op == 'like')
-						v = `*${v}*`
-					else if (op == 'like.right') {
-						v = `${v}*`
-						op = 'like'
-					} else if (op == 'in')
-						v = `(${v.join(',')})`
-					else if (k == 'and') {
-						v = '(' + v.filter(sub_query => sub_query.value == 0 || sub_query.value).map(sub_query => `${sub_query.label}.${sub_query.op}.${typeof sub_query.value == 'function' ? sub_query.value() : sub_query.value}`).join(',') + ')'
-					}
-
-					return {k: k, v: op ? `${op}.${v}` : v}
-				}).filter(query => typeof query != 'undefined').map(query => query.k + '=' + encodeURIComponent(query.v)).join('&')
+				let _query_string = options.queries
+						.filter(query => typeof query != 'undefined')
+						.map(query => {
+							// prepare the query kv pair and optional operator
+							let k = query.label
+							let v = query.value
+							let op = query.op
+
+							// return early if v is empty
+							if (typeof v == 'undefined' || (!v && v !== 0))
+								return undefined
+
+							if (op == 'like')
+								v = `*${v}*`
+							else if (op == 'like.right') {
+								v = `${v}*`
+								op = 'like'
+							} else if (op == 'in')
+								v = `(${v.join(',')})`
+							else if (k == 'and') {
+								v = '(' + v.filter(sub_query => sub_query.value == 0 || sub_query.value).map(sub_query => `${sub_query.label}.${sub_query.op}.${typeof sub_query.value == 'function' ? sub_query.value() : sub_query.value}`).join(',') + ')'
+							}
+
+							return {k: k, v: op ? `${op}.${v}` : v}
+						})
+						.map(query => query.k + '=' + encodeURIComponent(query.v)).join('&')
 
 				// append query string to url if necessary
 				if (_query_string)