module Echochamber::Validatable
Public Instance Methods
require_exactly_one(field_group, params)
click to toggle source
# File lib/echochamber/validatable.rb, line 14 def require_exactly_one(field_group, params) set_fields = 0 field_group.each do |field| begin validate_field(field, params) rescue RequiredParameterError next else set_fields += 1 end end raise ParameterError, "Exactly one of #{field_group.to_s} should be present" if set_fields != 1 end
require_keys(required_fields, params)
click to toggle source
# File lib/echochamber/validatable.rb, line 8 def require_keys(required_fields, params) required_fields.each do |field| validate_field(field, params) end end
validate_field(field, params)
click to toggle source
TODO (kayagoban) A validator accepting a block for conditional execution might be useful.
Maybe require_keys
should accept a block. Figure out later.
# File lib/echochamber/validatable.rb, line 32 def validate_field(field, params) begin value = params.fetch(field) required_error(field) if value.nil? || value.empty? rescue KeyError required_error(field) end end
Private Instance Methods
blank?(field)
click to toggle source
If blank? did not exist, we would need to invent it.
# File lib/echochamber/validatable.rb, line 48 def blank?(field) field.nil? || field.empty? end
required_error(field)
click to toggle source
# File lib/echochamber/validatable.rb, line 43 def required_error(field) raise RequiredParameterError, "Nil, empty or missing required parameter: #{field.to_s}" end