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Comments on Proposal: filters for post lists
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Proposal: filters for post lists
Several discussions have touched on the idea of being able to filter the contents of the post list. Whether your goal is to find unanswered questions, hide closed questions, hide ignored tags, or build a more complex filter, this is something we've wanted to be able to support for a while. A design mockup earlier this year showed one possible approach.
I have some ideas for how we could approach this feature and I'd like to hear what y'all think. Please note that this is a proposal; where I use language like "you can", I mean that's how I imagine this working, not that I'm promising that specific behavior. (I'm not in a position to make promises like that.)
Key idea #1: anything you can define in a filter, you can also search for, but not necessarily the other way around. Our search interface is pretty expressive (there's always more to do), and it would be silly to write a second search-like thing. Filters will be implemented on top of search. If we need to expand the search language, we will.
That said, there are searches you can do that don't make sense as filters for the post list -- for example, you can search specifically for answers. Filters are a subset of search.
Key idea #2: filters can be defined, named, and reused, and we'll provide some built-in ones. "Unanswered questions" seems like one that would be popular, for example. And if you want to refine the built-in "unanswered questions" filter (for example), you can.
You'll have access to all your defined filters in all categories and on all communities -- so if you want to have that meta "exclude status-completed" filter, you only have to write it once. When you choose a filter for a category, it'll stay that way until you choose another (or clear it).
Key idea #3: filters are based on properties of the posts, not properties of the users (at least for now). This is both a performance consideration and a complexity consideration. "Questions asked by new users" or "questions answered by people whose answers I tend to upvote" aren't really workable, I don't think. After we have something built and people are using it, if this is posing a problem we can revisit it then. Sure, it's all SQL under the hood, but we don't want to jump straight there.
Note that "my favorite tags" or "my ignored tags" would be ok -- that's just a shorthand for "posts with (or without) these tags". Those are properties of the posts.
Key idea #4: start simple, then expand. Ultimately, we might find people wanting to write filters with complex boolean expressions based on scores, ages of posts, numbers of answers, scores of answers, tags, "questions I haven't answered", and more. We don't know everything that will be needed or requested. By basing it on search from the beginning, I think we avoid making early decisions that would preclude future expansion. I'd rather refine and if necessary rework the UI later than try to build the giant union of all things that might be needed at the beginning. We're going to learn as we go, together, based on your feedback; let's take an iterative approach.
Enough talk; show me a picture.
I see filters as going in the right column (on the desktop site; mobile would be behind a button most likely). There would be a "filter" widget that, by default, just shows the selector, like this:
When you select a filter, the widget would expand to show its definition. This would include all the parts that can be customized, even if the current filter doesn't set them, so that you'll have access to them. For example:
If you edit the filter, the UI would somehow signal that you have unsaved changes and enable the "save as" button. I haven't given enough thought to the UI around "save" (edit) versus "save as" (clone and modify), and maybe a "save as" button isn't the right way to do this, but the goal would be to support both editing your own existing filters and creating new filters.
I don't know if this is the right list of filter properties. It's a first draft.
A post list is not necessarily questions; it could be articles, articles and questions, or other post types not yet defined. We'll need to offer only the filters that make sense for the current post list. I used questions in my examples here because that's what's most common.
What feedback do y'all have? What did I not get quite right, what did I miss, and what do we need to be thinking about that we aren't yet?
> Key idea #2: filters can be defined, named, and reused, and we'll provide some built-in ones. "Unanswered questions" s …
2y ago
There'll be more of an announcement coming, but here are some quick notes in the meantime. The top of each category n …
12mo ago
Filters also in search Filters and search are strongly related. As you say, the filter feature is something like a su …
2y ago
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Filters also in search
Filters and search are strongly related. As you say, the filter feature is something like a subset of search, only without the ability to input free text and possibly some other stuff. However, maybe search in return could profit from some of the UI elements for filters, making search easier.
Combine filters and sort orders in UI
Filters exclude elements from the displayed item list. However they do not say anything about the sort order of the still included elements. The pagination acts effectively also as a filter (only show elements X-Y in the list). However, one could sometimes use filters and sorting order interchangeably, like for example filtering for unanswered questions could as well be achieved by sorting by number of answers in ascending order instead and just looking at the first results. Therefore I think that in the UI both (sort order options and filter options) should be as closely together as possible.
The amount of filter options seems about right
I think that one could work well with the proposed amount of filter options. Maybe one could add also the highest answer score, something like questions with score > X but with no answer higher than score Y might be nice to see.
Scope of filters?
Some of them surely make sense globally on all sites but those with tags might not. Maybe there should be something like a scope button (make available on other sites), so one would have a local and a global filter set.
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