Update migrate.js

Update to support index additions/removals to existing columns

Author: davidtai

lib/migrate.js

@@ -142,13 +142,13 @@ const parseIndex = function(idx)
 
     let options = { };
 
-    if (idx.name) 
-        options.indexName = idx.name; // The name of the index. Default is __
+    if (idx.name)
+        options.name = options.indexName = idx.name; // The name of the index. Default is __
 
     // @todo: UNIQUE|FULLTEXT|SPATIAL
-    if (idx.unique) 
-        options.indicesType = 'UNIQUE';
-        
+    if (idx.unique)
+        options.type = options.indicesType = 'UNIQUE';
+
     if (idx.method)
         options.indexType = idx.type; // Set a type for the index, e.g. BTREE. See the documentation of the used dialect
 
@@ -461,6 +461,42 @@ const parseDifference = function(previousState, currentState)
                         depends: depends
                     });
                 }
+                
+                // updated index
+                // only support updating and dropping indexes
+                if (df.path[1] === 'indexes')
+                {
+                    let tableName = df.path[0];
+                    let keys = Object.keys(df.rhs)
+
+                    for (let k in keys) {
+                        let key = keys[k]
+                        let index = _.clone(df.rhs[key]);
+                        actions.push({
+                            actionType: 'addIndex',
+                            tableName: tableName,
+                            fields: df.rhs[key].fields,
+                            options: df.rhs[key].options,
+                            depends: [ tableName ]
+                        });
+                        break;
+                    }
+
+                    keys = Object.keys(df.lhs)
+                    for (let k in keys) {
+                        let key = keys[k]
+                        let index = _.clone(df.lhs[key]);
+                        actions.push({
+                            actionType: 'removeIndex',
+                            tableName: tableName,
+                            fields: df.lhs[key].fields,
+                            options: df.lhs[key].options,
+                            depends: [ tableName ]
+                        });
+                        break;
+                    }
+                }
+
             }
             break;