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create indexId when creating the message

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This commit is contained in:
Ulf Gebhardt 2023-07-13 10:40:31 +02:00
parent 0cce43500a
commit 70c310bc88
Signed by: ulfgebhardt
GPG Key ID: DA6B843E748679C9
1 changed files with 5 additions and 20 deletions
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25
backend/src/schema/resolvers/messages.ts
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@ -18,26 +18,8 @@ export default {
const resolved = await neo4jgraphql(object, params, context, resolveInfo)
if (resolved) {
const session = context.driver.session()
const countMessageTxPromise = session.readTransaction(async (transaction) => {
const countMessageCypher = `
MATCH((message:Message)-[:INSIDE]->(:Room { id: $roomId })) RETURN COUNT(message) AS count
`
const countMessageTxResponse = await transaction.run(countMessageCypher, {
roomId,
})
return await countMessageTxResponse.records[0].get('count')
})
try {
const count = await countMessageTxPromise
for (let i = 0; i < resolved.length; i++) {
resolved[i]._id = resolved[i].id
resolved[i].indexId = count - 1 - params.offset - i
}
} catch (error) {
throw new Error(error)
} finally {
session.close()
for (let i = 0; i < resolved.length; i++) {
resolved[i]._id = resolved[i].id
}
}
return resolved
@ -53,9 +35,12 @@ export default {
const writeTxResultPromise = session.writeTransaction(async (transaction) => {
const createMessageCypher = `
MATCH (currentUser:User { id: $currentUserId })-[:CHATS_IN]->(room:Room { id: $roomId })
OPTIONAL MATCH (m:Message)-[:INSIDE]->(room)
WITH MAX(m.indexId) as maxIndex, room, currentUser
CREATE (currentUser)-[:CREATED]->(message:Message {
createdAt: toString(datetime()),
id: apoc.create.uuid(),
indexId: CASE WHEN maxIndex IS NOT NULL THEN maxIndex + 1 ELSE 0 END,
content: $content
})-[:INSIDE]->(room)
RETURN message { .* }