您好,我正在尝试将我创建的自定义类型的单元格附加到我的 backgrid 实例,但我不断收到以下错误:
Uncaught TypeError: Failed to execute 'appendChild' on 'Node': parameter 1 is not of type 'Node'.
我 Console.logged 集合和列结果上面的异常发生在我的自定义单元格上。我认为这是因为它没有列属性:
这是我的自定义单元格的样子:
return QuestionCell.extend({
distractors: ['-', 't', 'f'],
template: 'gradescreen/table/mc',
render: function () {
var $val_td, view = this, correct_td = '',
current_state = view.model.get('responses').stateModel.get('state'),
correct_answer = '', selected = '-', select = '', pos, key_length;
view.current_response = view.getCurrentResponse(view.model);
if (view.current_response.get('response').prefix) {
selected = view.current_response.get(
'response'
).prefix === 'a' ? 't':'f';
}
if (view.question_meta.get('correct_prefix') ===
view.current_response.get(
'response').prefix) {
correct_td = ' correct_td';
}
$val_td = $('<td class="response_td' + correct_td + '" />');
app.fetchTemplate(view.template, function (tmpl) {
$val_td.html(tmpl({cid: view.cid, q_number: view.question_number}));
key_length = _.keys(view.question_meta.get('answers')).length;
for (pos = 0; pos <= key_length; pos++) {
var prefix = view.distractors[pos];
correct_answer =
prefix === view.question_meta.get('correct_prefix') ?
'correct_response':'';
select = selected === prefix ? 'selected="true"':'';
$('#answer_options_' + view.cid, $val_td).append(
'<option class="' + correct_answer + '" ' + select + ' >' +
prefix + '</option>');
}
if (current_state > 2) {
$('#answer_options_' + view.cid, $val_td).prop('disabled', true);
}
//view.bindEvents($val_td);
});
this.el = $val_td;
return this;
}
});
});
它是从我称为 QuestionCell 的单元格扩展而来的,该单元格是从 Backgrid.Cell 扩展而来的,并且仅包含默认属性和方法。
这就是我将单元格传递给背景网格的方式。
var grid, columns = [];
_.each(questions, function (question, position) {
if (question.get('type') === 'tf')
{
columns.push({
name: 'responses[0]',
label: 'Q-' + (position + 1),
cell: TFCell.extend({
question_meta : question,
question_number: position + 1,
group_id: view.group_id
})
});
}
else
{
//this last one isn't getting rendered for some reason.
columns.push({
label: 'Q-' + (position + 1),
cell: Backgrid.SelectCell.extend({
optionValues: [
['-', '-'], ['a', 'a'], ['b', 'b'],
['c', 'c'], ['d', 'd']
]
})
});
}
});
grid = new Backgrid.Grid({
columns: columns,
collection: view.model.get('student_responses')
});
$('#Student_Grid').append(grid.render().$el);
请帮忙。我怎样才能得到这个得到渲染。非常感谢