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Dropdown selections unique in repeat group

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  • Disable already used dropdown options in a repeat group​

    Suppose that you have a repeat group which has a Dropdown element of some type, and you want to try to ensure that each repeat row has a unique value selected for the dropdown.

    The three sets of Element Javascript below provide full functionality for this.
    • When a dropdown is loaded it disables any of its Options that are already in use in the repeat group.
    • When a user changes the value of a dropdown, all the Options in all the dropdowns are re-evaluated to disable Options that are in use.
    • The same happens when you delete a row.
    Note: This code is compatible with using pre-defined events to make the dropdown readonly or disabled, and is compatible with Fabrik's Enhanced Dropdowns (which use Chosen).

    On load event​

    Code:
    /* When this element == "", disable select items which have already been set in other repeat group items */
    if (Fabrik.debug) fconsole('load',this.element.id);
    if (this.element.value === "") {
    var selects = this.element.getParent('.fabrikGroup').getElements('.fabrikRepeatGroup___' + this.origId + ' select');
    selects.each(function (el) {
    if (this.element.id !== el.id) {
    var val = el.value;
    if (val !== '') {
    this.element.getElement('option[value="' + val + '"]').setAttribute('disabled', 'disabled');
    }
    }
    }.bind(this));
    }

    On change event​

    Code:
    /* When this element is changed, collect the select items from all matching fields and disable them in other dropdowns */
    if (Fabrik.debug) fconsole('change',this.element.id);
    var values = [];
    var selects = this.element.getParent('.fabrikGroup').getElements('.fabrikRepeatGroup___' + this.origId + ' select');
    selects.each(function (select) {
    var value = select.value;
    if (value !== '' && values.indexOf(value) < 0) {
    values.push(value);
    }
    });
    selects.each(function (select) {
    if (select.getAttribute('readonly') !== 'readonly' && !select.disabled) {
    select.getElements('option').each(function (option) {
    var value = option.value;
    if (!option.selected && value !== '') {
    if (values.indexOf(value) < 0) {
    option.removeAttribute('disabled');
    } else {
    option.setAttribute('disabled', 'disabled');
    }
    }
    });
    jQuery(select).trigger("liszt:updated");
    jQuery(select).trigger("chosen:updated");
    }
    });

    On unload event​

    Code:
    /* When this element is deleted, collect the select items from all other matching fields and disable them in other dropdowns */
    if (Fabrik.debug) fconsole('unload',this.element.id);
    var values = [];
    var selects = this.element.getParent('.fabrikGroup').getElements('.fabrikRepeatGroup___' + this.origId + ' select');
    selects.each(function (select) {
    if (this.element.id !== select.id) {
    var value = select.value;
    if (value !== '' && values.indexOf(value) < 0) {
    values.push(value);
    }
    }
    }.bind(this));
    selects.each(function (select) {
    if (select.getAttribute('readonly') !== 'readonly' && !select.disabled) {
    select.getElements('option').each(function (option) {
    var value = option.value;
    if (!option.selected && value !== '') {
    if (values.indexOf(value) < 0) {
    option.removeAttribute('disabled');
    } else {
    option.setAttribute('disabled', 'disabled');
    }
    }
    });
    jQuery(select).trigger("liszt:updated");
    jQuery(select).trigger("chosen:updated");
    }
    }.bind(this));
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