Add uuid and enum support to malli schema generator

[ghost]

With this patch malli-schema will generate correct entries for uuid columns and produce correct enum definitions for custom types under the condition that you have to pass in your type definitions.

It would be great if we could have the xray extract all the present type definitions for the database like it does with the table information. I tried that by adding something like:

(defn get-types
  [{:keys [metadata dbadapter catalog]}]
  (binding [njdf/*datafy-failure* :omit]
    (-> metadata
        (.getSuperTypes catalog (:schema-pattern dbadapter) nil)
        datafy-result-set)))

and have the results saved within the xray besides :tables as :types, but when invoked getSuperTypes says it is not implemented. Might have used the wrong Java function, but that one looked to be the best fit.

So for the enums you would have to do something like this:

(def malli-schema-defs
   (dbx/malli-schema (merge xray {:enums {"fm.contact_status_type"
                                          db-schema/FMContactStatusType}})))

Interface could be prettier, but for a first version it does the trick.

[ghost]

🙇🏻

[ghost]

This is the one-liner for uuid support

[ghost]

Main change for enum support:

I'm assuming here that types will always be identifyable by the pattern [schema].[name] which might not be 100% accurate? I think it will for for our case in PSQL but I'm not sure about other databases. Not sure if we can really upstream this later.

[jamiwissman]

Yeah this doesn't seem like the best way to identify enums, but I currently don't have any better ideas either. Maybe add a comment here to make it clear that we are saying any column type with a . is an enum.

[jamiwissman]

Yeah this doesn't seem like the best way to identify enums, but I currently don't have any better ideas either. Maybe add a comment here to make it clear that we are saying any column type with a . is an enum.