17 Matching Annotations
  1. Apr 2021
  2. Feb 2021
    1. To understand this helper, you should understand that every step invocation calls Output() for you behind the scenes. The following DSL use is identical to the one [above]. class Execute < Trailblazer::Activity::Railway step :find_provider, Output(Trailblazer::Activity::Left, :failure) => Track(:failure), Output(Trailblazer::Activity::Right, :success) => Track(:success)
    2. For branching out a separate path in an activity, use the Path() macro. It’s a convenient, simple way to declare alternative routes

      Seems like this would be a very common need: once you switch to a custom failure track, you want it to stay on that track until the end!!!

      The problem is that in a Railway, everything automatically has 2 outputs. But we really only need one (which is exactly what Path gives us). And you end up fighting the defaults when there are the automatic 2 outputs, because you have to remember to explicitly/verbosely redirect all of those outputs or they may end up going somewhere you don't want them to go.

      The default behavior of everything going to the next defined step is not helpful for doing that, and in fact is quite frustrating because you don't want unrelated steps to accidentally end up on one of the tasks in your custom failure track.

      And you can't use fail for custom-track steps becase that breaks magnetic_to for some reason.

      I was finding myself very in need of something like this, and was about to write my own DSL, but then I discovered this. I still think it needs a better DSL than this, but at least they provided a way to do this. Much needed.

      For this example, I might write something like this:

      step :decide_type, Output(Activity::Left, :credit_card) => Track(:with_credit_card)
      
      # Create the track, which would automatically create an implicit End with the same id.
      Track(:with_credit_card) do
          step :authorize
          step :charge
      end
      

      I guess that's not much different than theirs. Main improvement is it avoids ugly need to specify end_id/end_task.

      But that wouldn't actually be enough either in this example, because you would actually want to have a failure track there and a path doesn't have one ... so it sounds like Subprocess and a new self-contained ProcessCreditCard Railway would be the best solution for this particular example... Subprocess is the ultimate in flexibility and gives us all the flexibility we need)


      But what if you had a path that you needed to direct to from 2 different tasks' outputs?

      Example: I came up with this, but it takes a lot of effort to keep my custom path/track hidden/"isolated" and prevent other tasks from automatically/implicitly going into those steps:

      class Example::ValidationErrorTrack < Trailblazer::Activity::Railway
        step :validate_model, Output(:failure) => Track(:validation_error)
        step :save,           Output(:failure) => Track(:validation_error)
      
        # Can't use fail here or the magnetic_to won't work and  Track(:validation_error) won't work
        step :log_validation_error, magnetic_to: :validation_error,
          Output(:success) => End(:validation_error), 
          Output(:failure) => End(:validation_error) 
      end
      
      puts Trailblazer::Developer.render o
      Reloading...
      
      #<Start/:default>
       {Trailblazer::Activity::Right} => #<Trailblazer::Activity::TaskBuilder::Task user_proc=validate_model>
      #<Trailblazer::Activity::TaskBuilder::Task user_proc=validate_model>
       {Trailblazer::Activity::Left} => #<Trailblazer::Activity::TaskBuilder::Task user_proc=log_validation_error>
       {Trailblazer::Activity::Right} => #<Trailblazer::Activity::TaskBuilder::Task user_proc=save>
      #<Trailblazer::Activity::TaskBuilder::Task user_proc=save>
       {Trailblazer::Activity::Left} => #<Trailblazer::Activity::TaskBuilder::Task user_proc=log_validation_error>
       {Trailblazer::Activity::Right} => #<End/:success>
      #<Trailblazer::Activity::TaskBuilder::Task user_proc=log_validation_error>
       {Trailblazer::Activity::Left} => #<End/:validation_error>
       {Trailblazer::Activity::Right} => #<End/:validation_error>
      #<End/:success>
      
      #<End/:validation_error>
      
      #<End/:failure>
      

      Now attempt to do it with Path... Does the Path() have an ID we can reference? Or maybe we just keep a reference to the object and use it directly in 2 different places?

      class Example::ValidationErrorTrack::VPathHelper1 < Trailblazer::Activity::Railway
         validation_error_path = Path(end_id: "End.validation_error", end_task: End(:validation_error)) do
          step :log_validation_error
        end
        step :validate_model, Output(:failure) => validation_error_path
        step :save,           Output(:failure) => validation_error_path
      end
      
      o=Example::ValidationErrorTrack::VPathHelper1; puts Trailblazer::Developer.render o
      Reloading...
      
      #<Start/:default>
       {Trailblazer::Activity::Right} => #<Trailblazer::Activity::TaskBuilder::Task user_proc=validate_model>
      #<Trailblazer::Activity::TaskBuilder::Task user_proc=validate_model>
       {Trailblazer::Activity::Left} => #<Trailblazer::Activity::TaskBuilder::Task user_proc=log_validation_error>
       {Trailblazer::Activity::Right} => #<Trailblazer::Activity::TaskBuilder::Task user_proc=save>
      #<Trailblazer::Activity::TaskBuilder::Task user_proc=log_validation_error>
       {Trailblazer::Activity::Right} => #<End/:validation_error>
      #<Trailblazer::Activity::TaskBuilder::Task user_proc=save>
       {Trailblazer::Activity::Left} => #<Trailblazer::Activity::TaskBuilder::Task user_proc=log_validation_error>
       {Trailblazer::Activity::Right} => #<End/:success>
      #<End/:success>
      
      #<End/:validation_error>
      
      #<End/:failure>
      

      It's just too bad that:

      • there's not a Railway helper in case you want multiple outputs, though we could probably create one pretty easily using Path as our template
      • we can't "inline" a separate Railway acitivity (Subprocess "nests" it rather than "inlines")
    1. # Set the model name to change the field names generated by the Rails form helpers def self.model_name=(name) @_model_name = ActiveModel::Name.new(self, nil, name) end
  3. Jan 2021
  4. atomiks.github.io atomiks.github.io
    1. Can I use the title attribute?Yes. The content prop can be a function that receives the reference element as an argument and returns a string or element.tippy('button', { content(reference) { const title = reference.getAttribute('title'); reference.removeAttribute('title'); return title; }, });The title attribute should be removed once you have its content so the browser's default tooltip isn't displayed along with the tippy.
    1. // super-simple CSS Object to string serializer const css = obj => Object.entries(obj || {}) .map(x => x.join(":")) .join(";");
    1. const deinitPopper = () => { if (popperInstance) { popperInstance.destroy(); popperInstance = null; } };
  5. Dec 2020
    1. Transfer of plasmid RP4 during bacterial conjugation requires the plasmid-encoded TraJ protein, which binds to a 19-base pair invert sequence repetition within the transfer origin

      can it not be encoded in the host or a helper plasmid? Donor E. coli MFDpir already has it

  6. Oct 2020
  7. Sep 2020
  8. Mar 2020
    1. she wanted us to create a research paper about – well, about anything basically. Um, she gave us a bunch of ideas. She ac – like, she gave us, like, um, ideas like – hmm, like organic foods, GMOs, and just, like, you know, just problems in our society. But then, I chose, um, gentrification, so that’s what that’s about.

      "she" is the instructor, so this interview starts with "helper" idea right away