JsonLogic
Build rules and execute them in ruby. See https://jsonlogic.com
Installation
Install the gem and add to the application's Gemfile by executing:
$ bundle add json_logic_ruby
If bundler is not being used to manage dependencies, install the gem by executing:
$ gem install json_logic_ruby
Usage
Run json-logic:
RULE = <<~JSON
{ "and" : [
{">=" : [ { "var" : "length" }, 15 ]},
{">=" : [ { "var" : "size" }, 50 ]}
] }
JSON
DATA = JSON.parse('{ "length": 20, "size": 49 }')
logic = JsonLogic::Evaluator.new
logic.apply(JSON.parse(RULE), DATA)Get all variables used in a rule
logic = JsonLogic::Evaluator.new
res = logic.extract_vars(JSON.parse(RULE))
puts res
# will print -> ["length", "size"]Track report of all operations
logic = JsonLogic::Evaluator.new
logic.apply(JSON.parse(RULE), DATA)
puts logic.tracker.report
# will print
# LOGIC: 'and', RESULT = false
# DATA: 'length' data:20 >= expected:15, RESULT = true
# DATA: 'size' data:49 >= expected:50, RESULT = falseDevelopment
After checking out the repo, run bundle install to install dependencies.
Contributing
Please see CONTRIBUTING.md.
License
The gem is available as open source under the terms of the MIT License.
Code of Conduct
Everyone interacting in the Json::Logic project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.