diesel/query_builder/
debug_query.rsuse super::{AstPass, QueryBuilder, QueryFragment};
use crate::backend::Backend;
use std::fmt::{self, Debug, Display};
use std::marker::PhantomData;
pub struct DebugQuery<'a, T: 'a, DB> {
pub(crate) query: &'a T,
_marker: PhantomData<DB>,
}
impl<'a, T, DB> DebugQuery<'a, T, DB> {
pub(crate) fn new(query: &'a T) -> Self {
DebugQuery {
query,
_marker: PhantomData,
}
}
}
impl<T, DB> Display for DebugQuery<'_, T, DB>
where
DB: Backend + Default,
DB::QueryBuilder: Default,
T: QueryFragment<DB>,
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let mut query_builder = DB::QueryBuilder::default();
let backend = DB::default();
QueryFragment::<DB>::to_sql(self.query, &mut query_builder, &backend)
.map_err(|_| fmt::Error)?;
let debug_binds = DebugBinds::<_, DB>::new(self.query);
write!(f, "{} -- binds: {:?}", query_builder.finish(), debug_binds)
}
}
impl<T, DB> Debug for DebugQuery<'_, T, DB>
where
DB: Backend + Default,
DB::QueryBuilder: Default,
T: QueryFragment<DB>,
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let mut query_builder = DB::QueryBuilder::default();
let backend = DB::default();
QueryFragment::<DB>::to_sql(self.query, &mut query_builder, &backend)
.map_err(|_| fmt::Error)?;
let debug_binds = DebugBinds::<_, DB>::new(self.query);
f.debug_struct("Query")
.field("sql", &query_builder.finish())
.field("binds", &debug_binds)
.finish()
}
}
pub(crate) struct DebugBinds<'a, T: 'a, DB> {
query: &'a T,
_marker: PhantomData<DB>,
}
impl<'a, T, DB> DebugBinds<'a, T, DB> {
fn new(query: &'a T) -> Self {
DebugBinds {
query,
_marker: PhantomData,
}
}
}
impl<T, DB> Debug for DebugBinds<'_, T, DB>
where
DB: Backend + Default,
T: QueryFragment<DB>,
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let backend = DB::default();
let mut buffer = Vec::new();
let ast_pass = AstPass::debug_binds(&mut buffer, &backend);
self.query.walk_ast(ast_pass).map_err(|_| fmt::Error)?;
let mut list = f.debug_list();
for entry in buffer {
list.entry(&entry);
}
list.finish()?;
Ok(())
}
}