74 lines
2.3 KiB
Rust
74 lines
2.3 KiB
Rust
use diesel::{PgConnection, RunQueryDsl, select};
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macro_rules! find_by {
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($table:ident, $fn:ident, $($col:ident as $type:ident),+) => {
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/// Try to find a $table with a given $col
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pub fn $fn(conn: &PgConnection, $($col: $type),+) -> Option<Self> {
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$table::table
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$(.filter($table::$col.eq($col)))+
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.limit(1)
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.load::<Self>(conn)
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.expect("Error loading $table by $col")
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.into_iter().nth(0)
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}
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};
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}
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macro_rules! list_by {
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($table:ident, $fn:ident, $($col:ident as $type:ident),+) => {
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/// Try to find a $table with a given $col
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pub fn $fn(conn: &PgConnection, $($col: $type),+) -> Vec<Self> {
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$table::table
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$(.filter($table::$col.eq($col)))+
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.load::<Self>(conn)
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.expect("Error loading $table by $col")
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}
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};
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}
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macro_rules! get {
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($table:ident) => {
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pub fn get(conn: &PgConnection, id: i32) -> Option<Self> {
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$table::table.filter($table::id.eq(id))
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.limit(1)
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.load::<Self>(conn)
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.expect("Error loading $table by id")
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.into_iter().nth(0)
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}
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};
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}
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macro_rules! insert {
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($table:ident, $from:ident) => {
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pub fn insert(conn: &PgConnection, new: $from) -> Self {
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diesel::insert_into($table::table)
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.values(new)
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.get_result(conn)
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.expect("Error saving new $table")
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}
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};
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}
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sql_function!(nextval, nextval_t, (seq: ::diesel::sql_types::Text) -> ::diesel::sql_types::BigInt);
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sql_function!(setval, setval_t, (seq: ::diesel::sql_types::Text, val: ::diesel::sql_types::BigInt) -> ::diesel::sql_types::BigInt);
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fn get_next_id(conn: &PgConnection, seq: &str) -> i32 {
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// We cant' use currval because it may fail if nextval have never been called before
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let next = select(nextval(seq)).get_result::<i64>(conn).expect("Next ID fail");
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select(setval(seq, next - 1)).get_result::<i64>(conn).expect("Reset ID fail");
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next as i32
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}
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pub mod blog_authors;
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pub mod blogs;
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pub mod comments;
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pub mod follows;
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pub mod instance;
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pub mod likes;
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pub mod mentions;
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pub mod notifications;
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pub mod post_authors;
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pub mod posts;
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pub mod reshares;
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pub mod users;
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