Add Namespace Validator object

[denys-medynskyi]

NOT FINAL PR

I need help me out how are the "attributes" are set in the DSL.

For example we have KubeDSL::DSL::V1::Namespace

1. How to set valid object into metadata?
2. How to set invalid object into metadata?

Please add a comment in the PR and point me to the JSON you showed in the call :)

Any feedback is appreciated 🙏

[camertron]

Hey @deny7ko, looks like a good start. You can set attributes by calling methods with the same name as the attributes, for example:

KubeDSL.namespace do
  metadata do
    name 'foobar'
  end
end

This is equivalent to:

KubeDSL::DSL::V1::Namespace.new do
  metadata do
    name 'foobar'
  end
end

If you already have an instance of Namespace

ns = KubeDSL::DSL::V1::Namespace.new
ns.instance_eval do
  metadata do
    name  'foobar'
  end
end

Does that help?

[denys-medynskyi]

@camertron hey, yes, but I also want to understand when the value is invalid? I remember you showed me some *.json file which contains the type:
So we have a definition:

module KubeDSL::DSL::V1
  class Namespace < ::KubeDSL::DSLObject
    object_field(:metadata) { KubeDSL::DSL::Meta::V1::ObjectMeta.new }

Questions:

1. What makes metadata field invalid? How should I identify that?

2. Maybe you want me to start with testing this file - https://github.com/getkuby/kube-dsl/blob/master/lib/kube-dsl/dsl/v1/namespace_spec.rb#L3 ?

3. Please provide me with json file you showed me in the call

4. Please give me the link to your example app so I could play around to understand how all of these gems work together

[camertron]

@deny7ko ah ok I understand now :)

1. Here's a link to the schema for Namespace.
2. I think ObjectMeta is probably the right place to start. ObjectMeta is used by almost all other objects, including Namespace, Service, Deployment, etc. Here's a link to the schema. You can see that name is one of the fields, and has type string. The name field would be invalid if it contained a number, for example, instead of a string.
3. See above
4. Ah yes, sorry for the delay. The app can be found here. Follow the README to get everything set up (all the gems are included as submodules).