Need help with database logic

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1

In my app users are able to rate each others work from 1-5. My issue is that I want the user’s personal displayed rating to update after they receive 5 ratings and update again after the receive another 5 ratings (this is to ensure anonymity with ratings).

How would you set this up in the database? I can’t figure out a way to grab the 5 at a time.

2

So you want it like how in the app store it shows the number of 5 star reviews, 4 star review …

3

I’m planning to display a decimal rating (ex 3.7 out of 5).

I’ll try to explain to make it a little clearer.

Project 1 rating: 3.0
Project 2 rating: 3.0
Project 3 rating: 3.5
Project 4 rating: 4.0
Project 5 rating: 4.0

Rating displayed to user 3.5

Project 6 rating: 4.0
Project 7 rating: 4.0
Project 8 rating: 4.5
Project 9 rating: 5.0
Project 10 rating: 5.0

After 10th project is rated, user receives an updated rating with the new average 4.5.

4

So you want it to update every 5 ratings not every rating.

5

Yeah, exactly. This will make it to where the user doesn’t know how each individual person rated them.

6

Hi @Michael,

I can’t offer an elegant solution for this… rather “straightforward” one. Here is the logic:

  • you need to have 5 properties for “ratings”, 1 property to address the current rating (“cursor”), and 1 property to store the “public” rating
  • “cursor” will be changing from 1 to 5, and will determine, which “rating” you’ll update
  • to update the rating, you have 5 conditional actions, dependent on cursor value (you update rating1 if cursor = 1, rating2 if cursor = 2, etc)
  • after you update the ratingX, you increase cursor by 1
  • then you have an additional conditional action, when cursor = 6. At this action you calculate the new average rating and put it to “public rating” property
  • and then you have another conditional action, when cursor = 6: you set cursor to 1.

And the next 5 reviews will be updating the ratings again.

As for me, this should work. Not an elegant solution, though…

Best,
Victor

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7

Sorry for taking so long to reply to this. Thanks Victor. This is super helpful.

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