django-forms 相关问题

我需要将 -TOTAL_FORMS 的值更改为我添加到表单集中的字段数，以便 Django 将保存所有实例。表格的相关部分： ... 我需要将 -TOTAL_FORMS 的值更改为我添加到表单集中的任意多个字段，以便 Django 将保存所有实例。表格的相关部分： <div class="form-group"> <div class="input-group-sm"> <label class="text-muted">Approaches</label> <div class="form-control pl-4 pt-2"> {% for formset in inlines %} {{ formset.management_form }} {{ form.id }} {% for form in formset %} <div id="approach_form" class="row"> {{ form.errors }} <div class="col-4 pr-5>">{{ form.approach_type |add_class:"form-control" }}</div> <div class="col-4 pr-5>">{{ form.number |add_class:"form-control" }} </div> <div style="display: none;" class="col pr-5">{% if form.instance.pk %}{{ form.DELETE }}{% endif %}</div> </div> {% endfor %} {% endfor %} </div> </div> </div> JS函数调用 <script src="{% static 'flights/jquery.formset.js' %}"></script> <script type="text/javascript"> $(function() { $('#approach_form').formset({ prefix: '{{ approach_set.prefix }}' }); }) </script> JS脚本： /** * jQuery Formset 1.3-pre * @author Stanislaus Madueke (stan DOT madueke AT gmail DOT com) * @requires jQuery 1.2.6 or later * * Copyright (c) 2009, Stanislaus Madueke * All rights reserved. * * Licensed under the New BSD License * See: http://www.opensource.org/licenses/bsd-license.php */ ;(function($) { $.fn.formset = function(opts) { var options = $.extend({}, $.fn.formset.defaults, opts), flatExtraClasses = options.extraClasses.join(' '), totalForms = $('#id_' + options.prefix + '-TOTAL_FORMS'), maxForms = $('#id_' + options.prefix + '-MAX_NUM_FORMS'), minForms = $('#id_' + options.prefix + '-MIN_NUM_FORMS'), childElementSelector = 'input,select,textarea,label,div', $$ = $(this), applyExtraClasses = function(row, ndx) { if (options.extraClasses) { row.removeClass(flatExtraClasses); row.addClass(options.extraClasses[ndx % options.extraClasses.length]); } }, updateElementIndex = function(elem, prefix, ndx) { var idRegex = new RegExp(prefix + '-(\\d+|__prefix__)-'), replacement = prefix + '-' + ndx + '-'; if (elem.attr("for")) elem.attr("for", elem.attr("for").replace(idRegex, replacement)); if (elem.attr('id')) elem.attr('id', elem.attr('id').replace(idRegex, replacement)); if (elem.attr('name')) elem.attr('name', elem.attr('name').replace(idRegex, replacement)); }, hasChildElements = function(row) { return row.find(childElementSelector).length > 0; }, showAddButton = function() { return maxForms.length == 0 || // For Django versions pre 1.2 (maxForms.val() == '' || (maxForms.val() - totalForms.val() > 0)); }, /** * Indicates whether delete link(s) can be displayed - when total forms > min forms */ showDeleteLinks = function() { return minForms.length == 0 || // For Django versions pre 1.7 (minForms.val() == '' || (totalForms.val() - minForms.val() > 0)); }, insertDeleteLink = function(row) { var delCssSelector = $.trim(options.deleteCssClass).replace(/\s+/g, '.'), addCssSelector = $.trim(options.addCssClass).replace(/\s+/g, '.'); if (row.is('TR')) { // If the forms are laid out in table rows, insert // the remove button into the last table cell: row.children(':last').append('<a class="' + options.deleteCssClass +'" href="javascript:void(0)">' + options.deleteText + '</a>'); } else if (row.is('UL') || row.is('OL')) { // If they're laid out as an ordered/unordered list, // insert an <li> after the last list item: row.append('<li><a class="' + options.deleteCssClass + '" href="javascript:void(0)">' + options.deleteText +'</a></li>'); } else { // Otherwise, just insert the remove button as the // last child element of the form's container: row.append('<a class="' + options.deleteCssClass + '" href="javascript:void(0)">' + options.deleteText +'</a>'); } // Check if we're under the minimum number of forms - not to display delete link at rendering if (!showDeleteLinks()){ row.find('a.' + delCssSelector).hide(); } row.find('a.' + delCssSelector).click(function() { var row = $(this).parents('.' + options.formCssClass), del = row.find('input:hidden[id $= "-DELETE"]'), buttonRow = row.siblings("a." + addCssSelector + ', .' + options.formCssClass + '-add'), forms; if (del.length) { // We're dealing with an inline formset. // Rather than remove this form from the DOM, we'll mark it as deleted // and hide it, then let Django handle the deleting: del.val('on'); row.hide(); forms = $('.' + options.formCssClass).not(':hidden'); } else { row.remove(); // Update the TOTAL_FORMS count: forms = $('.' + options.formCssClass).not('.formset-custom-template'); totalForms.val(forms.length); } for (var i=0, formCount=forms.length; i<formCount; i++) { // Apply `extraClasses` to form rows so they're nicely alternating: applyExtraClasses(forms.eq(i), i); if (!del.length) { // Also update names and IDs for all child controls (if this isn't // a delete-able inline formset) so they remain in sequence: forms.eq(i).find(childElementSelector).each(function() { updateElementIndex($(this), options.prefix, i); }); } } // Check if we've reached the minimum number of forms - hide all delete link(s) if (!showDeleteLinks()){ $('a.' + delCssSelector).each(function(){$(this).hide();}); } // Check if we need to show the add button: if (buttonRow.is(':hidden') && showAddButton()) buttonRow.show(); // If a post-delete callback was provided, call it with the deleted form: if (options.removed) options.removed(row); return false; }); }; $$.each(function(i) { var row = $(this), del = row.find('input:checkbox[id $= "-DELETE"]'); if (del.length) { // If you specify "can_delete = True" when creating an inline formset, // Django adds a checkbox to each form in the formset. // Replace the default checkbox with a hidden field: if (del.is(':checked')) { // If an inline formset containing deleted forms fails validation, make sure // we keep the forms hidden (thanks for the bug report and suggested fix Mike) del.before('<input type="hidden" name="' + del.attr('name') +'" id="' + del.attr('id') +'" value="on" />'); row.hide(); } else { del.before('<input type="hidden" name="' + del.attr('name') +'" id="' + del.attr('id') +'" />'); } // Hide any labels associated with the DELETE checkbox: $('label[for="' + del.attr('id') + '"]').hide(); del.remove(); } if (hasChildElements(row)) { row.addClass(options.formCssClass); if (row.is(':visible')) { insertDeleteLink(row); applyExtraClasses(row, i); } } }); if ($$.length) { var hideAddButton = !showAddButton(), addButton, template; if (options.formTemplate) { // If a form template was specified, we'll clone it to generate new form instances: template = (options.formTemplate instanceof $) ? options.formTemplate : $(options.formTemplate); template.removeAttr('id').addClass(options.formCssClass + ' formset-custom-template'); template.find(childElementSelector).each(function() { updateElementIndex($(this), options.prefix, '__prefix__'); }); insertDeleteLink(template); } else { // Otherwise, use the last form in the formset; this works much better if you've got // extra (>= 1) forms (thnaks to justhamade for pointing this out): template = $('.' + options.formCssClass + ':last').clone(true).removeAttr('id'); template.find('input:hidden[id $= "-DELETE"]').remove(); // Clear all cloned fields, except those the user wants to keep (thanks to brunogola for the suggestion): template.find(childElementSelector).not(options.keepFieldValues).each(function() { var elem = $(this); // If this is a checkbox or radiobutton, uncheck it. // This fixes Issue 1, reported by Wilson.Andrew.J: if (elem.is('input:checkbox') || elem.is('input:radio')) { elem.attr('checked', false); } else { elem.val(''); } }); } // FIXME: Perhaps using $.data would be a better idea? options.formTemplate = template; if ($$.is('TR')) { // If forms are laid out as table rows, insert the // "add" button in a new table row: var numCols = $$.eq(0).children().length, // This is a bit of an assumption :| buttonRow = $('<tr><td colspan="' + numCols + '"><a class="' + options.addCssClass + '" href="javascript:void(0)">' + options.addText + '</a></tr>') .addClass(options.formCssClass + '-add'); $$.parent().append(buttonRow); if (hideAddButton) buttonRow.hide(); addButton = buttonRow.find('a'); } else { // Otherwise, insert it immediately after the last form: $$.filter(':last').after('<a class="' + options.addCssClass + '" href="javascript:void(0)">' + options.addText + '</a>'); addButton = $$.filter(':last').next(); if (hideAddButton) addButton.hide(); } addButton.click(function() { var formCount = parseInt(totalForms.val()), row = options.formTemplate.clone(true).removeClass('formset-custom-template'), buttonRow = $($(this).parents('tr.' + options.formCssClass + '-add').get(0) || this), delCssSelector = $.trim(options.deleteCssClass).replace(/\s+/g, '.'); applyExtraClasses(row, formCount); row.insertBefore(buttonRow).show(); row.find(childElementSelector).each(function() { updateElementIndex($(this), options.prefix, formCount); }); totalForms.val(formCount + 1); // Check if we're above the minimum allowed number of forms -> show all delete link(s) if (showDeleteLinks()){ $('a.' + delCssSelector).each(function(){$(this).show();}); } // Check if we've exceeded the maximum allowed number of forms: if (!showAddButton()) buttonRow.hide(); // If a post-add callback was supplied, call it with the added form: if (options.added) options.added(row); return false; }); } return $$; }; /* Setup plugin defaults */ $.fn.formset.defaults = { prefix: 'form', // The form prefix for your django formset formTemplate: null, // The jQuery selection cloned to generate new form instances addText: 'Add', // Text for the add link deleteText: 'Remove', // Text for the delete link addCssClass: 'add-row', // CSS class applied to the add link deleteCssClass: 'delete-row', // CSS class applied to the delete link formCssClass: 'dynamic-form', // CSS class applied to each form in a formset extraClasses: [], // Additional CSS classes, which will be applied to each form in turn keepFieldValues: '', // jQuery selector for fields whose values should be kept when the form is cloned added: null, // Function called each time a new form is added removed: null // Function called each time a form is deleted }; })(jQuery); 要更改的渲染 HTML： <input name="approach_set-TOTAL_FORMS" value="1" id="id_approach_set-TOTAL_FORMS" type="hidden"> 值需要匹配我创建的许多字段代码来自这里： https://github.com/elo80ka/django-dynamic-formset/blob/master/docs/usage.rst 谢谢！ // 限制形式 // LIMITANDO FORMS var x = document.getElementById('id_solicitacaodocumento_set-MAX_NUM_FORMS'); x.value = 5

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