Member Avatar for writerervin

Hi there. I'm looking to create a textbased browser game based on my old favorite anime. I figured out the basic structure of the data, but i've got one problem. is there a way to set the data up where a single user can have several of one item, each one upgradable seperately? I would appreciate any help.

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Short answer: yes — model each owned copy as its own record instead of a fixed column or a hard-coded maximum. was on the right track with the idea of treating items as data rows; that lets a user hold any number of copies and lets each copy carry its own upgrade state.

A common pattern is a small item-catalog plus a per-user instances table. Example (schema fields only):

item_types
- id
- name
- base_stats   -- canonical definition, no per-user state

user_items    -- one row = one owned copy, independently upgradable
- id
- user_id
- item_type_id
- instance_uuid   -- optional, useful for external refs
- level
- upgrade_data    -- TEXT/JSON blob for per-instance modifiers
- acquired_at

Queries become simple: fetch all copies of type X for user Y, count them with COUNT(*), or update a single instance by id. If you need upgrade history, add a user_item_upgrades table that records timestamps and changes.

Practical tips and traps:

  • No schema-level “max copies” required — enforce limits in app logic or, if needed, with triggers/constraints.
  • Use transactions or SELECT ... FOR UPDATE when awarding items concurrently to avoid race conditions.
  • Index user_id and item_type_id for fast lookups; make instance_uuid unique if used.
  • For millions of stackable, non-upgradable items keep aggregated counts and only create per-instance rows for unique/upgradable items (hybrid approach).
  • Consider archiving or garbage-collecting old/unused instances to keep the table manageable.

This answers ’s concern about hard-coding limits and builds on ’s idea. Ignore the stray noise from — focus on the instance-per-copy model for predictable, scalable behavior.

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Member Avatar for Insensus

This is just a suggestion but maybe it'll be the key to you figuring it out.

Keep an 'items' table containing all the items in your game with a structure like:
id, type, upgrades, owner
Then you could just fetch all items with a certain type and a certain owner enabling multiples of one item upgradable seperately.

Member Avatar for writerervin

thanks for the input. also is there a way that the user can have a variable number of an item without hard coding the number into the table?

Member Avatar for Insensus

What do you mean by hard coding something into a table?

Member Avatar for writerervin

i mean like putting into the table the maximum number of total items. i would like to be able to put it into the table, without having to worry if the maximum number isn't exceeded.

Member Avatar for Insensus

Well I think my approach is only limited by the physical MySQL limits which probably results in more than enough room for items unless your game goes really big.
But then you'd probably get some real programmers to do the job for you, eh. :p

Member Avatar for writerervin

the approach would to be to insert the item into the user table, then. that should work. i appreciate the help.

Member Avatar for 8g2h8bt9

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