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use crate::Connection;
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use diesel::r2d2::{ConnectionManager, CustomizeConnection, Error as ConnError, Pool};
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#[cfg(feature = "sqlite")]
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use diesel::{dsl::sql_query, ConnectionError, RunQueryDsl};
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use rocket_contrib::databases::diesel;
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pub type DbPool = Pool<ConnectionManager<Connection>>;
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// From rocket documentation
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// Connection request guard type: a wrapper around an r2d2 pooled connection.
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#[database("plume")]
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pub struct DbConn(pub Connection);
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// Execute a pragma for every new sqlite connection
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#[derive(Debug)]
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pub struct PragmaForeignKey;
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impl CustomizeConnection<Connection, ConnError> for PragmaForeignKey {
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#[cfg(feature = "sqlite")] // will default to an empty function for postgres
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fn on_acquire(&self, conn: &mut Connection) -> Result<(), ConnError> {
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sql_query("PRAGMA foreign_keys = on;")
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.execute(conn)
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.map(|_| ())
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.map_err(|_| {
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ConnError::ConnectionError(ConnectionError::BadConnection(String::from(
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"PRAGMA foreign_keys = on failed",
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)))
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})
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}
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}
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#[cfg(test)]
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pub(crate) mod tests {
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use super::*;
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use diesel::Connection as _;
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#[derive(Debug)]
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pub struct TestConnectionCustomizer;
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impl CustomizeConnection<Connection, ConnError> for TestConnectionCustomizer {
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fn on_acquire(&self, conn: &mut Connection) -> Result<(), ConnError> {
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PragmaForeignKey.on_acquire(conn)?;
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Ok(conn.begin_test_transaction().unwrap())
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}
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}
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}
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