cgen: support string interpolation in ORM queries (#17141)

cmd/tools/vtest-self.v

@@ -126,6 +126,7 @@ const (
 		'vlib/orm/orm_create_and_drop_test.v',
 		'vlib/orm/orm_insert_test.v',
 		'vlib/orm/orm_fn_calls_test.v',
+		'vlib/orm/orm_string_interpolation_in_where_test.v',
 		'vlib/db/sqlite/sqlite_test.v',
 		'vlib/db/sqlite/sqlite_orm_test.v',
 		'vlib/db/sqlite/sqlite_vfs_lowlevel_test.v',
@@ -194,6 +195,7 @@ const (
 		'vlib/orm/orm_create_and_drop_test.v',
 		'vlib/orm/orm_insert_test.v',
 		'vlib/orm/orm_fn_calls_test.v',
+		'vlib/orm/orm_string_interpolation_in_where_test.v',
 		'vlib/v/tests/orm_sub_struct_test.v',
 		'vlib/v/tests/orm_sub_array_struct_test.v',
 		'vlib/v/tests/orm_joined_tables_select_test.v',

vlib/orm/orm_string_interpolation_in_where_test.v

@@ -0,0 +1,36 @@
+import db.sqlite
+
+struct User {
+	id   int    [primary; sql: serial]
+	name string
+}
+
+fn test_string_interpolation() {
+	mut db := sqlite.connect(':memory:') or { panic(err) }
+
+	sql db {
+		create table User
+	}
+
+	user_suffix := '_user'
+
+	first_user := User{
+		name: 'first${user_suffix}'
+	}
+
+	second_user := User{
+		name: 'second${user_suffix}'
+	}
+
+	sql db {
+		insert first_user into User
+		insert second_user into User
+	}
+
+	users := sql db {
+		select from User where name == 'first${user_suffix}'
+	}
+
+	assert users.len == 1
+	assert users.first().name == 'first${user_suffix}'
+}

vlib/v/gen/c/sql.v

@@ -286,6 +286,9 @@ fn (mut g Gen) sql_expr_to_orm_primitive(expr ast.Expr) {
 		ast.StringLiteral {
 			g.sql_write_orm_primitive(ast.string_type, expr)
 		}
+		ast.StringInterLiteral {
+			g.sql_write_orm_primitive(ast.string_type, expr)
+		}
 		ast.IntegerLiteral {
 			g.sql_write_orm_primitive(ast.int_type, expr)
 		}
@@ -419,6 +422,9 @@ fn (mut g Gen) sql_where_data(expr ast.Expr, mut fields []string, mut parenthese
 		ast.StringLiteral {
 			data << expr
 		}
+		ast.StringInterLiteral {
+			data << expr
+		}
 		ast.IntegerLiteral {
 			data << expr
 		}