fix: sync with alter:true doesn't use field name (#9529)

lib/model.js

@@ -1220,6 +1220,7 @@ class Model {
     options.hooks = options.hooks === undefined ? true : !!options.hooks;
 
     const attributes = this.tableAttributes;
+    const rawAttributes = this.fieldRawAttributesMap;
 
     return Promise.try(() => {
       if (options.hooks) {
@@ -1247,17 +1248,17 @@ class Model {
 
               _.each(attributes, (columnDesc, columnName) => {
                 if (!columns[columnName]) {
-                  changes.push(() => this.QueryInterface.addColumn(this.getTableName(options), columnName, attributes[columnName]));
+                  changes.push(() => this.QueryInterface.addColumn(this.getTableName(options), attributes[columnName].field || columnName, attributes[columnName]));
                 }
               });
               _.each(columns, (columnDesc, columnName) => {
-                const currentAttributes = attributes[columnName];
-                if (!currentAttributes) {
+                const currentAttribute = rawAttributes[columnName];
+                if (!currentAttribute) {
                   changes.push(() => this.QueryInterface.removeColumn(this.getTableName(options), columnName, options));
-                } else if (!currentAttributes.primaryKey) {
+                } else if (!currentAttribute.primaryKey) {
                   // Check foreign keys. If it's a foreign key, it should remove constraint first.
-                  const references = currentAttributes.references;
-                  if (currentAttributes.references) {
+                  const references = currentAttribute.references;
+                  if (currentAttribute.references) {
                     const database = this.sequelize.config.database;
                     const schema = this.sequelize.config.schema;
                     // Find existed foreign keys
@@ -1276,7 +1277,7 @@ class Model {
                       }
                     });
                   }
-                  changes.push(() => this.QueryInterface.changeColumn(this.getTableName(options), columnName, attributes[columnName]));
+                  changes.push(() => this.QueryInterface.changeColumn(this.getTableName(options), columnName, currentAttribute));
                 }
               });
               return changes.reduce((p, fn) => p.then(fn), Promise.resolve());

test/integration/model/sync.test.js

@@ -18,7 +18,8 @@ describe(Support.getTestDialectTeaser('Model'), () => {
     it('should remove a column if it exists in the databases schema but not the model', function() {
       const User = this.sequelize.define('testSync', {
         name: Sequelize.STRING,
-        age: Sequelize.INTEGER
+        age: Sequelize.INTEGER,
+        badgeNumber: { type: Sequelize.INTEGER, field: 'badge_number' }
       });
       return this.sequelize.sync()
         .then(() => {
@@ -30,6 +31,8 @@ describe(Support.getTestDialectTeaser('Model'), () => {
         .then(() => User.describe())
         .then(data => {
           expect(data).to.not.have.ownProperty('age');
+          expect(data).to.not.have.ownProperty('badge_number');
+          expect(data).to.not.have.ownProperty('badgeNumber');
           expect(data).to.have.ownProperty('name');
         });
     });
@@ -41,11 +44,33 @@ describe(Support.getTestDialectTeaser('Model'), () => {
       return this.sequelize.sync()
         .then(() => this.sequelize.define('testSync', {
           name: Sequelize.STRING,
-          age: Sequelize.INTEGER
+          age: Sequelize.INTEGER,
+          height: { type: Sequelize.INTEGER, field: 'height_cm' }
         }))
         .then(() => this.sequelize.sync({alter: true}))
         .then(() => testSync.describe())
-        .then(data => expect(data).to.have.ownProperty('age'));
+        .then(data => {
+          expect(data).to.have.ownProperty('age');
+          expect(data).to.have.ownProperty('height_cm');
+          expect(data).not.to.have.ownProperty('height');
+        });
+    });
+
+    it('should alter a column using the correct column name (#9515)', function() {
+      const testSync = this.sequelize.define('testSync', {
+        name: Sequelize.STRING
+      });
+      return this.sequelize.sync()
+        .then(() => this.sequelize.define('testSync', {
+          name: Sequelize.STRING,
+          badgeNumber: { type: Sequelize.INTEGER, field: 'badge_number' }
+        }))
+        .then(() => this.sequelize.sync({alter: true}))
+        .then(() => testSync.describe())
+        .then(data => {
+          expect(data).to.have.ownProperty('badge_number');
+          expect(data).not.to.have.ownProperty('badgeNumber');
+        });
     });
 
     it('should change a column if it exists in the model but is different in the database', function() {