2021-02-14 12:10:12 +03:00
|
|
|
use crate::database::PostgresConnection;
|
2021-02-08 23:42:13 +03:00
|
|
|
use crate::path::PathBuilder;
|
2021-02-14 00:03:37 +03:00
|
|
|
use crate::StdResult;
|
2021-02-08 23:42:13 +03:00
|
|
|
use std::fs;
|
|
|
|
use std::path::PathBuf;
|
|
|
|
|
2021-02-14 00:03:37 +03:00
|
|
|
pub trait Upgrade {
|
2021-02-14 12:10:12 +03:00
|
|
|
fn upgrade(&self, connection: &mut PostgresConnection) -> StdResult<()>;
|
2021-02-14 00:03:37 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
pub trait Downgrade {
|
2021-02-14 12:10:12 +03:00
|
|
|
fn downgrade(&self, connection: &mut PostgresConnection) -> StdResult<()>;
|
2021-02-14 00:03:37 +03:00
|
|
|
}
|
|
|
|
|
2021-02-08 23:42:13 +03:00
|
|
|
#[derive(Debug)]
|
|
|
|
pub struct Migration {
|
|
|
|
upgrade_sql: PathBuf,
|
|
|
|
downgrade_sql: PathBuf,
|
|
|
|
name: String,
|
|
|
|
}
|
|
|
|
|
|
|
|
impl Migration {
|
|
|
|
pub(crate) fn new(directory: &PathBuf) -> Option<Migration> {
|
|
|
|
if directory.is_dir() {
|
|
|
|
let name = directory
|
|
|
|
.file_name()
|
|
|
|
.and_then(|name| name.to_str())
|
|
|
|
.unwrap_or_default();
|
|
|
|
let upgrade_sql = PathBuilder::from(directory).append("up.sql").build();
|
|
|
|
let downgrade_sql = PathBuilder::from(directory).append("down.sql").build();
|
|
|
|
|
|
|
|
if upgrade_sql.exists() && downgrade_sql.exists() {
|
|
|
|
return Some(Migration {
|
|
|
|
upgrade_sql,
|
|
|
|
downgrade_sql,
|
|
|
|
name: String::from(name),
|
|
|
|
});
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
None
|
|
|
|
}
|
2021-02-14 00:03:37 +03:00
|
|
|
}
|
2021-02-08 23:42:13 +03:00
|
|
|
|
2021-02-14 00:03:37 +03:00
|
|
|
impl Migration {
|
2021-02-08 23:42:13 +03:00
|
|
|
pub fn name(&self) -> &String {
|
|
|
|
&self.name
|
|
|
|
}
|
2021-02-14 00:03:37 +03:00
|
|
|
}
|
2021-02-08 23:42:13 +03:00
|
|
|
|
2021-02-14 00:03:37 +03:00
|
|
|
impl Upgrade for Migration {
|
2021-02-14 12:10:12 +03:00
|
|
|
fn upgrade(&self, connection: &mut PostgresConnection) -> StdResult<()> {
|
2021-02-08 23:42:13 +03:00
|
|
|
let content = fs::read_to_string(&self.upgrade_sql)?;
|
|
|
|
|
2021-02-13 23:44:41 +03:00
|
|
|
connection.create_migrations_table()?;
|
|
|
|
connection.apply_sql(&content)?;
|
|
|
|
connection.insert_migration_info(self.name())?;
|
2021-02-08 23:42:13 +03:00
|
|
|
|
|
|
|
Ok(())
|
|
|
|
}
|
2021-02-14 00:03:37 +03:00
|
|
|
}
|
2021-02-08 23:42:13 +03:00
|
|
|
|
2021-02-14 00:03:37 +03:00
|
|
|
impl Downgrade for Migration {
|
2021-02-14 12:10:12 +03:00
|
|
|
fn downgrade(&self, connection: &mut PostgresConnection) -> StdResult<()> {
|
2021-02-08 23:42:13 +03:00
|
|
|
let content = fs::read_to_string(&self.downgrade_sql)?;
|
|
|
|
|
2021-02-13 23:44:41 +03:00
|
|
|
connection.apply_sql(&content)?;
|
|
|
|
connection.delete_migration_info(self.name())?;
|
2021-02-08 23:42:13 +03:00
|
|
|
|
|
|
|
Ok(())
|
|
|
|
}
|
|
|
|
}
|