Serialize common default values and column parameters

1 defaultValue The default value is

Set character defaults .

name: {
     type: DataTypes.STRING, defaultValue: 'zhangsan' },
status: {
     type: DataTypes.INTEGER, defaultValue: 1 },
flag: {
     type: DataTypes.BOOLEAN, allowNull: false, defaultValue: true },

Default value of date => current time

createdTime: {
     type: DataTypes.DATE, defaultValue: DataTypes.NOW }, 

2 allowNull Allow null

allowNull Allow null , The default is true.
If the allowNull Set to false The column will be added not null, This means that the column cannot be empty .

title: {
     type: DataTypes.STRING, allowNull: false },

3 unique Unique constraint

unique Short for creating unique constraints .

someUnique: {
     type: DataTypes.STRING, unique: true },

4 primaryKey Primary key

someUnique: {
     type: DataTypes.STRING, primaryKey: true },

5 field

Can pass field Property specifies the custom column name ：

name: {
     type: DataTypes.STRING, field: 'username' },