我有
an application处理货币输入.但是,如果你在美国,你可以输入一个号码为12,345.67;在法国,可能是12.345,67.
在Rails中有一个简单的方法来适应货币进入一个地区吗?
请注意,我不是要显示货币(ala number_to_currency),我正在寻找一个用货币字符串输入的人,并将其转换成十进制.
解决方法
你可以给一个镜头:
def string_to_float(string) string.gsub!(/[^\d.,]/,'') # Replace all Currency Symbols,Letters and -- from the string if string =~ /^.*[\.,]\d{1}$/ # If string ends in a single digit (e.g.,2) string = string + "0" # make it,20 in order for the result to be in "cents" end unless string =~ /^.*[\.,]\d{2}$/ # If does not end in,00 / .00 then string = string + "00" # add trailing 00 to turn it into cents end string.gsub!(/[\.,'') # Replace all (.) and (,) so the string result becomes in "cents" string.to_f / 100 # Let to_float do the rest end
和测试案例:
describe Currency do it "should mix and match" do Currency.string_to_float("$1,000.50").should eql(1000.50) Currency.string_to_float("€ 1.000,50").should eql(1000.50) Currency.string_to_float("€ 1.000,--").should eql(1000.to_f) Currency.string_to_float("$1,000.--").should eql(1000.to_f) end it "should strip the € sign" do Currency.string_to_float("€1").should eql(1.to_f) end it "should strip the $sign" do Currency.string_to_float("$1").should eql(1.to_f) end it "should strip letter characters" do Currency.string_to_float("a123bc2").should eql(1232.to_f) end it "should strip - and --" do Currency.string_to_float("100,-").should eql(100.to_f) Currency.string_to_float("100,--").should eql(100.to_f) end it "should convert the,as delimitor to a ." do Currency.string_to_float("100,10").should eql(100.10) end it "should convert ignore,and . as separators" do Currency.string_to_float("1.000,10").should eql(1000.10) Currency.string_to_float("1,000.10").should eql(1000.10) end it "should be generous if you make a type in the last '0' digit" do Currency.string_to_float("123,2").should eql(123.2) end