Updated the dependencies, adjusted book handler code

server/database/models/author.js

@@ -12,7 +12,8 @@ module.exports = sequelize.define('author', {
 
 	name: {
 		type: Sequelize.TEXT,
-		allowNull: true,
-		defaultValue: null
+		allowNull: false,
+		defaultValue: null,
+		unique: true,
 	}
 });

server/database/models/book.js

@@ -12,8 +12,9 @@ module.exports = sequelize.define('book', {
 
 	title: {
 		type: Sequelize.TEXT,
-		allowNull: true,
-		defaultValue: null
+		allowNull: false,
+		defaultValue: null,
+		unique: true,
 	},
 
 	published: {

server/database/models/index.js

@@ -3,6 +3,7 @@ const Author = require('./author');
 
 //relations
 Author.hasMany(Book);
+Book.belongsTo(Author);
 
 //collate
 module.exports = {