sqlite package: package scoped db variable instead of injection

[youdzinn]

Hello Ben,

first of all, thanks for the great stuff!

I'm a newbie to Golang (Spring Boot switcher), and I saw many examples including real production applications when db connection instance is private package scoped, like

db/
  database.go // with var db *sql.db declared
  entity.go // functions or methods use db variable for CRUD ops

Tell me please why use dependency injection instead of such kind of private package variable?

[benbjohnson]

Hi Eugene,

The downside to using a global db variable in your package is that it can make testing problematic. Especially if you want to parallelize tests to speed them up. I generally try to avoid global variables because it makes it more difficult to change code and reuse code over time.

[youdzinn]

Got that, thanks for your help.