How does the TypeScript interface accurately represent the DATETIME type of SQLite?

TypeScript interface mapping SQLite DATETIME type

When defining an interface in TypeScript to map the DATETIME type of a SQLite database, it is crucial to choose the right type, which is directly related to type security and the consistency of the database data. This article will explore how to accurately represent the DATETIME type of SQLite using the TypeScript interface (for example: 2024-06-04 11:32:59).

Many developers choose the Date type, which can represent date and time, and the TypeScript compiler can also recognize it. However, there are some potential problems with direct use of the Date type:

1. Accuracy Difference: The accuracy of Date object may be lower than the DATETIME type of SQLite, resulting in slight deviations during data conversion or comparison.
2. Time zone problem: The Date object is associated with the time zone. Different time zones of the database server and client will cause inconsistent time display.

To avoid these problems and improve type safety, it is recommended to use string types:

 interface Test {
  id: number;
  name: string;
  desc: string;
  selected: boolean;
  createTime: string;
  updateTime: string;
}

Using string types allows you to accurately control the format of date and time to avoid loss of accuracy. When interacting with the database, you need to convert the string to a Date object or format it as needed. This approach ensures data integrity and consistency.

Ultimately, the determinant of type selection depends on the application scenario and the requirements for accuracy and consistency. If the accuracy requirements are not high, the Date type is simple enough; but pursues higher precision and stricter type control, you should select the string type and perform the necessary conversions.

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