Added Event model and logging to Collection

server/models/Event.js

@@ -0,0 +1,53 @@
+// @flow
+import { DataTypes, sequelize } from '../sequelize';
+
+const Event = sequelize.define('event', {
+  id: {
+    type: DataTypes.UUID,
+    defaultValue: DataTypes.UUIDV4,
+    primaryKey: true,
+  },
+  name: DataTypes.STRING,
+  data: DataTypes.JSONB,
+
+  userId: {
+    type: 'UUID',
+    allowNull: true,
+    references: {
+      model: 'users',
+    },
+  },
+
+  collectionId: {
+    type: 'UUID',
+    allowNull: true,
+    references: {
+      model: 'collections',
+    },
+  },
+
+  teamId: {
+    type: 'UUID',
+    allowNull: true,
+    references: {
+      model: 'teams',
+    },
+  },
+});
+
+Event.associate = models => {
+  Event.belongsTo(models.User, {
+    as: 'user',
+    foreignKey: 'userId',
+  });
+  Event.belongsTo(models.Collection, {
+    as: 'collection',
+    foreignKey: 'collectionId',
+  });
+  Event.belongsTo(models.Team, {
+    as: 'team',
+    foreignKey: 'teamId',
+  });
+};
+
+export default Event;