toucan2.jdbc.result-set — io.github.camsaul/toucan2 1.0.538

Implementation of a custom next.jdbc result set builder function, builder-fn, and the default implementation; [[reduce-result-set]] which is used to reduce results from JDBC databases.

builder-fn clj

(builder-fn conn₁ model₂ rset opts)

Return the next.jdbc builder function to use to create the results when querying a model. By default, this uses instance-builder-fn, and returns Toucan 2 instances; but if you want to use plain maps you can use one of the other builder functions that ships with next.jdbc, or write your own custom builder function.

builder-fn is defined in toucan2.jdbc.result-set (toucan2/jdbc/result_set.clj:25).

It caches methods using a methodical.impl.cache.watching.WatchingCache.

It uses the method combination methodical.impl.combo.threaded.ThreadingMethodCombination with the threading strategy :thread-last.

It uses the dispatcher methodical.impl.dispatcher.multi_default.MultiDefaultDispatcher with hierarchy #'clojure.core/global-hierarchy and prefs {}.

The default value is :default.

It uses the method table methodical.impl.method_table.standard.StandardMethodTable.

These primary methods are known:

• :default, defined in toucan2.jdbc.result-set (toucan2/jdbc/result_set.clj:119)

  It has the following documentation:

  Default next.jdbc builder function. Uses instance-builder-fn to return Toucan 2 instances.

• [:toucan2.jdbc.mysql-mariadb/connection :default], defined in [[toucan2.jdbc.mysql-mariadb]] (toucan2/jdbc/mysql_mariadb.clj:133)

  It has the following documentation:

  This is an icky hack for MariaDB/MySQL. Inserted rows come back with the newly inserted ID as :insert-id rather than the actual name of the primary key column. So tweak the :label-fn we pass to next.jdbc to rename :insert-id to the actual PK name we'd expect. This only works for tables with a single-column PK.

instance-builder-fn clj

(instance-builder-fn model rset opts)

Create a result set map builder function appropriate for passing as the :builder-fn option to next.jdbc that will create toucan2.instances of model using namespaces determined by toucan2.model/table-name->namespace.