phalcon save流程

phalcon官方文档是这么写的

Operation	Name	Can stop operation?	Explanation
Inserting/Updating	beforeValidation	YES	Is executed before the fields are validated for not nulls/empty strings or foreign keys
Inserting	beforeValidationOnCreate	YES	Is executed before the fields are validated for not nulls/empty strings or foreign keys when an insertion operation is being made
Updating	beforeValidationOnUpdate	YES	Is executed before the fields are validated for not nulls/empty strings or foreign keys when an updating operation is being made
Inserting/Updating	onValidationFails	YES (already stopped)	Is executed after an integrity validator fails
Inserting	afterValidationOnCreate	YES	Is executed after the fields are validated for not nulls/empty strings or foreign keys when an insertion operation is being made
Updating	afterValidationOnUpdate	YES	Is executed after the fields are validated for not nulls/empty strings or foreign keys when an updating operation is being made
Inserting/Updating	afterValidation	YES	Is executed after the fields are validated for not nulls/empty strings or foreign keys
Inserting/Updating	beforeSave	YES	Runs before the required operation over the database system
Updating	beforeUpdate	YES	Runs before the required operation over the database system only when an updating operation is being made
Inserting	beforeCreate	YES	Runs before the required operation over the database system only when an inserting operation is being made
Updating	afterUpdate	NO	Runs after the required operation over the database system only when an updating operation is being made
Inserting	afterCreate	NO	Runs after the required operation over the database system only when an inserting operation is being made
Inserting/Updating	afterSave	NO	Runs after the required operation over the database system

   所以如果要给model某些字段赋默认值，不应该在beforeSave中，应该在beforeValidation中，否则在validation中就会判断字段是缺失的而报错，不会执行到beforeSave.