从URI Regex获取Tridion项目ID

Question

If I have a Tridion URI like this 'tcm:1-23-8' and I want to get 23 with a Regular Expression.

The following works, but I know there is a better way. tcm: and '-8' are always there. The parts that change are 1 and 23.

var schemaUri = $display.getItem().getId(); // tcm:1-23-8
var re = /tcm:\d-/gi;  // = 23-8
var schemaIdWithItemType = schemaUri.replace(re, "");
re = /-8/gi;
var schemaId = schemaIdWithItemType.replace(re, "");

Answer 1

If the number is always between the 2 dashes, you could do this:

var schemaId = schemaUri.split('-')[1];

This does the following:

1. split the string on the '-' character --> ['tcm:1', '23', '8'];
2. Get the second item from that array, '23'

Or, try this:

var schemaId = schemaUri.match(/-\d+-/)[0].replace(/-/g,'');

This'll find the number in between the dashes with .match(/-\\d+-/) , then remove the dashes.

Answer 2

Rather than calling $display.getItem().getId(); , you can just call $display.getUri(); and then use the split()

var schemaId = $display.getUri().split('-')[1];

Answer 3

If you did want a pure Regex solution...

/^tcm:(\d+)-(\d+)(?:-(\d+))?$/i

Should validate your Tridion URI's format and provide you with 3 submatches, the second of which will be the Item ID