Maybe an odd request, but I’m interested in creating an “opt in” poll that just has one option, but the poll is throwing an error. Is there any way, even a workaround, that can work?
Put in a fake second option, delete it once it is in the composer and see what happens?
good idea but I tried that. Just tried again right here but it complains when I save the post.
make both options “yes”. 
I was thinking that instead of using a poll as a checkbox maybe the checklist plugin could do what you need
But AFAICT, it won’t.
Maybe make a “no” option and then use CSS to display: none it?
Then there will likely be a “100%” showing, so it feels like this is getting into new plugin territory to me.
How about “Like this post if you’re going to be there 
!”
But you can’t un-like to say you won’t, which I think is probably also a problem with a poll.
Another solution is a wiki, maybe.
@tobiaseigen if you want two options, instead of one, then a poll already works.
Thanks, all! Really appreciate all the suggestions.
In the end, I decided to just bag the poll in this case. Interestingly, I got a handful of likes already to the topic without even asking for it, so people seem enthusiastic and are showing it. 
I do think that down the road it might be of value to allow one option to choose from, but it’s not a high priority for me. Perhaps someone else wants to make it possible at some stage. The 100% showing issue seems to be the only potential snag, beyond the UX tweaks that would be needed.
是否只允许一个投票选项 @sam @eviltrout？我想这应该没问题吧？
是的，我同意，针对这个特定用例，这样做是合理的。
好的 @eviltrout，我假设这个限制很容易放宽，所以你可以分配它吗？
原始问题可以像任何其他需要统计人数的 RSVP 一样解决。通常，了解还有哪些人本想来参加是有价值的。
- 是的，我参加！周五见！
- 不，很遗憾，我无法参加！
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编辑：我现在明白了。显示统计结果会很有用。
再次编辑：我想，单个投票选项会让自动化变得更简单，因为只有一个结果。
为投票仅允许一个选项非常简单。不过，我们需要添加一个“清除投票”按钮。
通常情况下，其他投票不会出现这个问题，因为选项涵盖了所有可能的答案。而只有一个选项时，目前无法取消投票。
我们是否应该在每个投票中都显示“清除我的投票”按钮？
不，暂时忽略这一点。如果你设置的是单选投票，则无法撤销投票。情况就是这样。
我刚合并了一个 PR，现在支持单选投票了 
- 看起来不错
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