derive_sql/traits/
delete.rs

1use super::*;
2
3pub trait DeleteFlavoredStatement {
4  fn delete_stmt<C, R>(&self, conn: &C) -> Result<String>
5  where C: Connection<R>, 
6        R: Row;
7
8  fn delete_with_filter_stmt<C, R, F>(&self, conn: &C, filter: &F) -> Result<String>
9  where C: Connection<R>,
10        R: Row,
11        F: traits::FlavoredFilter,
12  {
13    statement_with_conn_filter_order_limit_offset_options::<_, _, _, structs::order::None>(self.delete_stmt(conn)?,
14      conn, Some(filter), None, None, None)
15  }
16
17  fn delete_with_filter_order_limit_offset_stmt<C, R, F, O>(&self, conn: &C, filter: &F, order: &O, limit: usize, offset: usize) -> Result<String>
18  where C: Connection<R>,
19        R: Row,
20        F: traits::FlavoredFilter, 
21        O: traits::FlavoredOrder,
22  {
23    statement_with_conn_filter_order_limit_offset_options(self.delete_stmt(conn)?,
24      conn, Some(filter), Some(order), Some(limit), Some(offset))
25  }
26}
27
28pub trait DeleteStatement {
29  fn delete_stmt(&self) -> Result<String>;
30
31  fn delete_with_filter_stmt<F>(&self, filter: &F) -> Result<String>
32  where F: traits::Filter
33  {
34    statement_with_filter_order_limit_offset_options::<_, structs::order::None>(self.delete_stmt()?,
35      Some(filter), None, None, None)
36  }
37
38  fn delete_with_filter_order_limit_offset_stmt<F, O>(&self, filter: &F, order: &O, limit: usize, offset: usize) -> Result<String>
39  where F: traits::Filter, O: traits::Order,
40  {
41    statement_with_filter_order_limit_offset_options(self.delete_stmt()?,
42      Some(filter), Some(order), Some(limit), Some(offset))
43  }
44}
45
46impl<T> DeleteFlavoredStatement for T
47where T: DeleteStatement
48{
49  fn delete_stmt<C, R>(&self, _conn: &C) -> Result<String>
50  where C: Connection<R>,
51        R: Row,
52  {
53    DeleteStatement::delete_stmt(self)
54  }
55}
56
57pub trait Delete<C, R> 
58where C: Connection<R>,
59      R: Row,
60{
61  /// Delete all items of type stored in database
62  fn delete(&self, conn: &mut C) -> Result<()>;
63
64  /// Delete all items of type matching the filtering criteria stored in database
65  fn delete_with_filter<F>(&self, conn: &mut C, filter: &F) -> Result<()>
66  where F: traits::FlavoredFilter;
67
68  /// Delete `limit` items after nominated `offset` items of type matching the filtering criteria and ordered in accordance with order
69  /// statement
70  fn delete_with_filter_order_limit_offset<F, O>(&self, conn: &mut C, filter: &F, order: &O, limit: usize, offset: usize) -> Result<()>
71  where F: traits::FlavoredFilter, O: FlavoredOrder;
72}
derive_sql/traits/delete.rs

derive_sql/traits/
delete.rs
