This crate defines the djanco macro. The macro points at functions which
contain Djanco queries and specifies the configuration of the database that
should be used for a particular query. The tags are used by
to generate an
execution harness for all the queries in a given cargo crate.
The macro provided by djanco_ext is called djanco and looks like this:
#[djanco(April, 2020, subsets(C, Python, SmallProjects))]
pub fn my_query(database: &Database, _log: &Log, output: &Path) -> Result<(), std::io::Error> {
database.projects()
.group_by(project::Language)
.sort_by(project::Stars)
.sample(Top(1000))
.into_csv_in_dir(output, "top_1000_by_stars.csv")
}The macro specifies a number of arguments that configure the date (savepoint)
at which the database will checked out and the substores from which the data
will be read. See
for details.