65 lines
1.6 KiB
Rust
65 lines
1.6 KiB
Rust
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use crate::database;
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use crate::path::PathBuilder;
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use postgres::Client;
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use std::fs;
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use std::path::PathBuf;
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#[derive(Debug)]
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pub struct Migration {
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upgrade_sql: PathBuf,
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downgrade_sql: PathBuf,
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name: String,
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}
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impl Migration {
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pub(crate) fn new(directory: &PathBuf) -> Option<Migration> {
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if directory.is_dir() {
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let name = directory
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.file_name()
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.and_then(|name| name.to_str())
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.unwrap_or_default();
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let upgrade_sql = PathBuilder::from(directory).append("up.sql").build();
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let downgrade_sql = PathBuilder::from(directory).append("down.sql").build();
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if upgrade_sql.exists() && downgrade_sql.exists() {
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return Some(Migration {
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upgrade_sql,
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downgrade_sql,
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name: String::from(name),
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});
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}
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}
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None
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}
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pub fn name(&self) -> &String {
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&self.name
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}
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pub fn upgrade(&self, client: &mut Client) -> Result<(), Box<dyn std::error::Error + 'static>> {
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let content = fs::read_to_string(&self.upgrade_sql)?;
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database::create_migrations_table(client)?;
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database::apply_sql(client, &content)?;
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database::insert_migration_info(client, self.name())?;
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Ok(())
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}
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pub fn downgrade(
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&self,
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client: &mut Client,
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) -> Result<(), Box<dyn std::error::Error + 'static>> {
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let content = fs::read_to_string(&self.downgrade_sql)?;
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database::apply_sql(client, &content)?;
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database::delete_migration_info(client, self.name())?;
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Ok(())
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}
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}
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