40 lines
1.4 KiB
JavaScript
40 lines
1.4 KiB
JavaScript
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(function($) {
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$.fn.prepopulate = function(dependencies, maxLength) {
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/*
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Depends on urlify.js
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Populates a selected field with the values of the dependent fields,
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URLifies and shortens the string.
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dependencies - array of dependent fields ids
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maxLength - maximum length of the URLify'd string
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*/
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return this.each(function() {
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var prepopulatedField = $(this);
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var populate = function () {
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// Bail if the field's value has been changed by the user
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if (prepopulatedField.data('_changed')) {
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return;
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}
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var values = [];
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$.each(dependencies, function(i, field) {
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field = $(field);
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if (field.val().length > 0) {
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values.push(field.val());
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}
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});
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prepopulatedField.val(URLify(values.join(' '), maxLength));
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};
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prepopulatedField.data('_changed', false);
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prepopulatedField.change(function() {
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prepopulatedField.data('_changed', true);
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});
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if (!prepopulatedField.val()) {
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$(dependencies.join(',')).keyup(populate).change(populate).focus(populate);
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}
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});
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};
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})(django.jQuery);
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