systematic revision of =~ usage in AMo

activemodel/lib/active_model/attribute_methods.rb

@@ -1,5 +1,6 @@
 require 'concurrent/map'
 require 'mutex_m'
+require 'active_support/core_ext/regexp'
 
 module ActiveModel
   # Raised when an attribute is not defined.
@@ -366,7 +367,7 @@ module ActiveModel
         # using the given `extra` args. This falls back on `define_method`
         # and `send` if the given names cannot be compiled.
         def define_proxy_call(include_private, mod, name, send, *extra) #:nodoc:
-          defn = if name =~ NAME_COMPILABLE_REGEXP
+          defn = if NAME_COMPILABLE_REGEXP.match?(name)
             "def #{name}(*args)"
           else
             "define_method(:'#{name}') do |*args|"
@@ -374,7 +375,7 @@ module ActiveModel
 
           extra = (extra.map!(&:inspect) << "*args").join(", ".freeze)
 
-          target = if send =~ CALL_COMPILABLE_REGEXP
+          target = if CALL_COMPILABLE_REGEXP.match?(send)
             "#{"self." unless include_private}#{send}(#{extra})"
           else
             "send(:'#{send}', #{extra})"

activemodel/lib/active_model/type/time.rb

@@ -29,7 +29,7 @@ module ActiveModel
         return value unless value.is_a?(::String)
         return if value.empty?
 
-        if value =~ /^2000-01-01/
+        if value.start_with?('2000-01-01')
           dummy_time_value = value
         else
           dummy_time_value = "2000-01-01 #{value}"

activemodel/lib/active_model/validations/format.rb

@@ -1,5 +1,6 @@
-module ActiveModel
+require 'active_support/core_ext/regexp'
 
+module ActiveModel
   module Validations
     class FormatValidator < EachValidator # :nodoc:
       def validate_each(record, attribute, value)
@@ -8,7 +9,7 @@ module ActiveModel
           record_error(record, attribute, :with, value) if value.to_s !~ regexp
         elsif options[:without]
           regexp = option_call(record, :without)
-          record_error(record, attribute, :without, value) if value.to_s =~ regexp
+          record_error(record, attribute, :without, value) if regexp.match?(value.to_s)
         end
       end
 

activemodel/test/validators/email_validator.rb

@@ -1,6 +1,8 @@
+require 'active_support/core_ext/regexp'
+
 class EmailValidator < ActiveModel::EachValidator
   def validate_each(record, attribute, value)
     record.errors[attribute] << (options[:message] || "is not an email") unless
-      value =~ /^([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})$/i
+      /^([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})$/i.match?(value)
   end
-end
+end