Fix serialization of arrays of string in update

Author: onaluf

lib/postgresql.js

@@ -766,6 +766,10 @@ PostgreSQL.prototype.toColumnValue = function(prop, val, isWhereClause) {
     });
   }
 
+  if (prop.type instanceof Array && prop.type[0] === String) {
+    return JSON.stringify(val);
+  }
+
   return val;
 };
 

test/postgresql.test.js

@@ -64,6 +64,9 @@ describe('postgresql connector', function() {
       loc: 'GeoPoint',
       created: Date,
       approved: Boolean,
+      tags: {
+        type: ['string'],
+      },
     });
     created = new Date();
   });
@@ -201,6 +204,28 @@ describe('postgresql connector', function() {
     });
   });
 
+  it('should support updating arrays of string types', function(done) {
+    let postId;
+    Post.create({title: 'Updating Arrays', content: 'Content', tags: ['AA', 'AB']})
+      .then((post)=> {
+        postId = post.id;
+        post.should.have.property('tags');
+        post.tags[1].should.eql('AB');
+        return Post.updateAll({where: {id: postId}}, {tags: ['AA', 'AC']});
+      })
+      .then((wooot)=> {
+        return Post.findOne({where: {id: postId}});
+      })
+      .then((post)=> {
+        post.should.have.property('tags');
+        post.tags[1].should.eql('AC');
+        done();
+      })
+      .catch((error) => {
+        done(error);
+      });
+  });
+
   it('should support boolean types with false value', function(done) {
     Post.create(
       {title: 'T2', content: 'C2', approved: false, created: created},