Ferreteria/v0.5/feature
< Ferreteria | v0.5
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the Features system
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A "Feature", in this context, is a set of classes which work together to handle a particular type of data, traditionally represented by a table in a database. The class-set for each Feature is primarily organized around a descendent (subclass) of the Feature class.
Each Feature subclass represents a singleton object and has a SpecSlug() static method for identifying its table specs in the config data.
Pages
- /rendering: how Feature data is converted to display output (typically HTML)
- /access: how to access a Feature object
Related
- feature registry: translates URI slugs into Feature objects
- table registry: allows cross-referencing of tables within an app
Connections
A Feature that uses a Table doesn't know directly about that Table. The way the Table is accessed goes like this:
- Each Feature corresponds to a Spec, which typically includes the Table name and may include other information such as the name of the key field (typically "ID").
- The Feature doesn't contain the Spec, but looks it up when needed (
GetMySpec()). - Each Feature works with stored data via its Storage Row, which looks up the Table in the Table Registry using the Feature's Spec.
Note that Storage doesn't have to use a database; the Dropin-viewer Dropin just uses an in-memory array generated from reading the "dropins" folder.