tagging

Given a SCHEMA for implementing tags ITEM ItemId, ItemContent TAG TagId, TagName ITEM_TAG ItemId, TagId What is the best way to limit the number of ITEMS to return when selecting with tags? SELECT i.ItemContent, t.TagName FROM item i INNER JOIN ItemTag it ON i.id = it.ItemId INNER JOIN tag t ON t.id = it.TagId is of course the easiest way to get them all back, but using a limit clause breaks down, because you get an duplicate of all the items for each tag, which counts toward the number of rows in LIMIT. My second solution uses a MySQL function GROUP_CONCAT() to combine all tags matching the

I am creating an app that has photo sharing, and I am trying to add in the functionality to mention (or tag) users. Twitter is what originally starting using "@" with a username to tag users but now everything from Facebook to Instagram is using it. Is this something that is implemented on the iOS side or in the back end? I am currently programming the back end in Django, but for some reason I think this would be accomplished on the iOS end. There is surprisingly very little information out their on how to mention users in either Django or iOS. Basically, when creating a post, I'd like to

I have my tags desinged like this in my database: Table: Item Columns: ItemID, Title, Content Table: Tag Columns: TagID, Title Table: ItemTag Columns: ItemID, TagID //example -- this is the right sidebar of stackoverflow c# × 59279 sql × 14885 asp.net-mvc × 9123 linq × 4337 tags × 339 if I wanted to know the count of each tag such as how stackoverflow counts their tags how would I do it? What kind of query would I perform. I am open to both regular sql and linq Add another column in the table Tag that work as counter. When you add or remove a tag from an item you update the counter (in other

Background (TLDR; provided for the sake of completion) Seeking advice on an optimal solution to an odd requirement. I'm a (literature) student in my fourth year of college with only my own guidance in programming. I'm competent enough with Python that I won't have trouble implementing solutions I find (most of the time) and developing upon them, but because of my newbness, I'm seeking advice on the best ways I might tackle this peculiar problem. Already using NLTK, but differently from the examples in the NLTK book. I'm already utilizing a lot of stuff from NLTK, particularly WordNet, so that

I would like to me able to set (and get) a custom metadata attribute for any file. What is the best way to do this? Thanks The OpenMeta framework is a de-facto third-party standard for adding metadata to OS X files using extended attributes. It is used by a number of third-party applications. Custom attribute names work for me: $ xattr -w com.apple.metadata:MyAttribute gfdylvyieo a.txt $ mdls -n MyAttribute a.txt MyAttribute = "gfdylvyieo" $ mdfind gfdylvyieo /private/tmp/a.txt $ mdfind 'MyAttribute=*' /private/tmp/a.txt xattr -wx is not needed if the value is plain text: xattr -w com.apple