Phil Pirozhkov

Adapt the code from `rubocop-rspec` that does that. fixes #3904 There is a huge problem with this approach. [LibYAML is not capable of parsing and emitting comments](https://github.com/yaml/libyaml/issues/42) for our `config/default.yml`,...

Idea: Replace `dependent: :delete`/`dependent: :nullify` with FK `on_delete:`/`on_update:`

5

Hey @djezzzl ! :wave: Cascade deletion is sometimes a very expensive operation. In case the association is defined as `dependent: :delete`, it is possible to rely on the database to...

Recommend citext for `case_sensitive: false` validated fields

2

Does it make sense to do so? https://www.postgresql.org/docs/13/citext.html has a good rationale for using citext. It's a useful feature for columns like, e.g. emails. Regarding performance - should be faster...

The problem only becomes apparent when `prepared_statements:` option is set to `false`. This is typical and [recommended by Rails when connecting via PgBouncer](https://guides.rubyonrails.org/configuring.html#configuring-a-postgresql-database). ``` ActiveRecord::StatementInvalid: PG::UndefinedFunction: ERROR: operator does not...

citext false positive

1

Hey @djezzzl ! :wave: I have the following in `db/schema.rb`: ```ruby enable_extension "citext" create_table "groups", force: :cascade do |t| t.citext "name", null: false t.index ["name"], name: "index_groups_on_name", unique: true ```...

Create flexible map generation filtering logic

1

Currently we have filtering logic literally hardcoded here: [`lib/crystalball/map_generator/helpers/path_filter.rb`](https://github.com/toptal/crystalball/blob/master/lib/crystalball/map_generator/helpers/path_filter.rb). We need it to be a bit more flexible so we can specify a list of directories\files to filter out of...

Get prediction as a list in STDOUT

6

Crystalball needs to be able to list predicted examples without actually running them. It's useful for further load balancing with Knapsack\whatever. Proposed interface: `crystalball --dry-prediction` which outputs a list of...

Watch mode

1

Add a `--watch` that would run tests as Crystalball finds the changes in the source code. - Use guard (or similar) - Lookup needs to be faster - Only run...

Redis? Neo4j (or another graph database)? Pros: - Would allow things like levels of proximity between files and affected specs, as well as reduce redundancy of spec file data Cons:...

The way lookup works now: ```ruby examples_to_run = [ ] changed_files.each do |file| # n examples.each do |ex| # n * n examples_to_run