gistfile1.txt

   Compiling diesel_ltree v0.1.0 (file:///Users/kivikakk/kivikakk/diesel_ltree)
error[E0599]: no method named `load` found for type `diesel::query_builder::SelectStatement<tests::my_tree::table, diesel::query_builder::select_clause::SelectClause<functions::ltree2text_t<functions::lca_t<diesel::expression::bound::Bound<diesel::types::Array<types::Ltree>, std::vec::Vec<_>>>>>>` in the current scope
  --> src/tests.rs:65:10
   |
65 |         .load::<String>(&connection)
   |          ^^^^
   |
   = note: the method `load` exists but the following trait bounds were not satisfied:
           `_ : diesel::query_builder::QueryId`
           `_ : diesel::query_builder::QueryId`
           `&mut diesel::query_builder::SelectStatement<tests::my_tree::table, diesel::query_builder::select_clause::SelectClause<functions::ltree2text_t<functions::lca_t<diesel::expression::bound::Bound<diesel::types::Array<types::Ltree>, std::vec::Vec<_>>>>>> : diesel::query_builder::AsQuery`
           `_ : diesel::query_builder::QueryFragment<_>`
           `_ : diesel::query_builder::QueryId`
           `&mut diesel::query_builder::SelectStatement<tests::my_tree::table, diesel::query_builder::select_clause::SelectClause<functions::ltree2text_t<functions::lca_t<diesel::expression::bound::Bound<diesel::types::Array<types::Ltree>, std::vec::Vec<_>>>>>> : diesel::query_builder::Query`
           `&mut diesel::query_builder::SelectStatement<tests::my_tree::table, diesel::query_builder::select_clause::SelectClause<functions::ltree2text_t<functions::lca_t<diesel::expression::bound::Bound<diesel::types::Array<types::Ltree>, std::vec::Vec<_>>>>>> : diesel::query_builder::Query`
           `&mut diesel::query_builder::SelectStatement<tests::my_tree::table, diesel::query_builder::select_clause::SelectClause<functions::ltree2text_t<functions::lca_t<diesel::expression::bound::Bound<diesel::types::Array<types::Ltree>, std::vec::Vec<_>>>>>> : diesel::query_builder::Query`

error: aborting due to previous error

error: Could not compile `diesel_ltree`.

To learn more, run the command again with --verbose.

test.rs

#[test]
fn functions() {
    let connection = get_connection();

    let result = my_tree::table
        .select(ltree2text(lca(vec![])))
        .load::<String>(&connection)
        .unwrap();

    assert_eq!(result, "1.2");
}