Weishen/Hydro
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core: fix problem solution vote race condition (#861)

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undefined authored and GitHub committed 2024-08-16 01:18:14 +08:00
1 parent 598972b1c9
commit 8903486c6c
6 files changed
+54 -51
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packages/hydrooj/src/model/solution.ts
+12 -6
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@@ -70,12 +70,18 @@ class SolutionModel {
}
static async vote(domainId: string, psid: ObjectId, uid: number, value: number) {
let pssdoc = await document.getStatus(domainId, document.TYPE_PROBLEM_SOLUTION, psid, uid);
await document.setStatus(domainId, document.TYPE_PROBLEM_SOLUTION, psid, uid, { vote: value });
if (pssdoc) value += -pssdoc.vote;
const psdoc = await document.inc(domainId, document.TYPE_PROBLEM_SOLUTION, psid, 'vote', value);
pssdoc = await document.getStatus(domainId, document.TYPE_PROBLEM_SOLUTION, psid, uid);
return [psdoc, pssdoc];
const before = await document.setStatus(
domainId, document.TYPE_PROBLEM_SOLUTION, psid, uid,
{ vote: value }, 'before',
);
let inc = value;
if (before?.vote) inc -= before.vote;
return [
inc
? await document.inc(domainId, document.TYPE_PROBLEM_SOLUTION, psid, 'vote', inc)
: await document.get(domainId, document.TYPE_PROBLEM_SOLUTION, psid),
await document.getStatus(domainId, document.TYPE_PROBLEM_SOLUTION, psid, uid),
];
}
static async getListStatus(domainId: string, psids: ObjectId[], uid: number) {