is there a graph (more precisely "forrest"?) database wherein identities could be defined such that their attributes may not only be a reference to but also a computation over other identities?

i imagine a transactor that receives an event (an update over an identity) and applies it over the db. each event triggers updates for all the identities that branch from the initial point down the tree until there is no more deps.

That sounds similar to a rules engine like http://www.clara-rules.org/ or https://github.com/oakes/odoyle-rules

you have base facts and you can also have rules/derived facts

Excel came to my mind 🙂

excel is place-oriented

Yes, and it’s not really a database. But it probably has some properties you’re looking for

In SQL you can do that with views and triggers. In datalog with rules and functions or ions (datomic)

also there are computed columns (maybe the name is wrong, look it up)

hi I have an issue with webpack

so I was following this tutorial:

https://smartcontracts.org/docs/quickstart/local-quickstart.html

and on the npm start step, which runs webpack serve --mode development --env development I get this error:

% npm start

> [email protected] prestart /Users/prikshetsharma/Desktop/hello
> npm run copy:types


> [email protected] copy:types /Users/prikshetsharma/Desktop/hello
> rsync -avr .dfx/$(echo ${DFX_NETWORK:-'**'})/canisters/** --exclude='assets/' --exclude='idl/' --exclude='*.wasm' --delete src/declarations

building file list ... done

sent 314 bytes  received 20 bytes  668.00 bytes/sec
total size is 19112  speedup is 57.22

> [email protected] start /Users/prikshetsharma/Desktop/hello
> webpack serve --mode development --env development

No production canister_ids.json found. Continuing with local
[webpack-cli] Failed to load '/Users/prikshetsharma/Desktop/hello/webpack.config.js' config
[webpack-cli] TypeError: Cannot read property 'hello' of undefined
    at Object.<anonymous> (/Users/prikshetsharma/Desktop/hello/webpack.config.js:96:35)
    at Module._compile (/Users/prikshetsharma/Desktop/hello/node_modules/v8-compile-cache/v8-compile-cache.js:192:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:1114:10)
    at Module.load (internal/modules/cjs/loader.js:950:32)
    at Function.Module._load (internal/modules/cjs/loader.js:790:12)
    at Module.require (internal/modules/cjs/loader.js:974:19)
    at require (/Users/prikshetsharma/Desktop/hello/node_modules/v8-compile-cache/v8-compile-cache.js:159:20)
    at WebpackCLI.tryRequireThenImport (/Users/prikshetsharma/Desktop/hello/node_modules/webpack-cli/lib/webpack-cli.js:32:22)
    at WebpackCLI.loadConfig (/Users/prikshetsharma/Desktop/hello/node_modules/webpack-cli/lib/webpack-cli.js:1554:34)
    at WebpackCLI.resolveConfig (/Users/prikshetsharma/Desktop/hello/node_modules/webpack-cli/lib/webpack-cli.js:1677:49)
npm ERR! code ELIFECYCLE
npm ERR! errno 2
npm ERR! [email protected] start: `webpack serve --mode development --env development`
npm ERR! Exit status 2
npm ERR!
npm ERR! Failed at the [email protected] start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/prikshetsharma/.npm/_logs/2021-10-06T09_04_41_152Z-debug.log

this doesn't seem like a good off-topic question. But also you have a stack trace telling you that line 96, column 35 of hello/webpack.config.js it cannot read the property 'hello' of an object that is undefined

it’s working on other machines, but not this one

#other-languages