feat: support query(sql, object) (#12)

Author: fangk

lib/operator.js

@@ -28,7 +28,19 @@ proto.escapeId = function (value, forbidQualified) {
 };
 
 proto.format = function (sql, values, stringifyObjects, timeZone) {
-  return SqlString.format(sql, values, stringifyObjects, timeZone);
+  // if values is object, not null, not Array;
+  if (!Array.isArray(values) && typeof values === 'object' && values !== null) {
+    // object not support replace column like ??;
+    return sql.replace(/\:(\w+)/g, function(txt, key) {
+      if (values.hasOwnProperty(key)) {
+        return SqlString.escape(values[key]);
+      }
+      // if values don't hasOwnProperty, return origin txt;
+      return txt;
+    });
+  } else {
+    return SqlString.format(sql, values, stringifyObjects, timeZone);
+  }
 };
 
 proto.query = function*(sql, values) {

test/operator.test.js

@@ -30,6 +30,30 @@ describe('operator.test.js', function () {
       let op = new Operator();
       assert.equal(op.format('SET ?? = ?', ['dt', op.literals.now], true), 'SET `dt` = now()');
     });
+
+    it('should get literal string by string', function () {
+      let op = new Operator();
+      assert.equal(op.format('SET name = ?', 'test'), 'SET name = \'test\'');
+    });
+
+    it('should get literal string by object', function () {
+      let op = new Operator();
+      assert.equal(op.format('SET dt = :now and name = :name and age = :age', {
+        now: op.literals.now,
+        name: 'test'
+      }), 'SET dt = now() and name = \'test\' and age = :age');
+    });
+
+    it('should get literal string by boundary', function () {
+      let op = new Operator();
+      assert.equal(op.format('SET name = ?', null), 'SET name = ?');
+      assert.equal(op.format('SET name = ?', undefined), 'SET name = ?');
+      assert.equal(op.format('SET name = ?', 0), 'SET name = 0');
+      assert.equal(op.format('SET name = ?', 1), 'SET name = 1');
+      assert.equal(op.format('SET name = ?', 'foo'), 'SET name = \'foo\'');
+      assert.equal(op.format('SET name = ?', true), 'SET name = true');
+      assert.equal(op.format('SET name = ?', false), 'SET name = false');
+    });
   });
 
   describe('_query()', function () {