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fix cypher when posts do not exist

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This commit is contained in:
Moriz Wahl 2022-10-05 13:10:18 +02:00
parent 76bfe48476
commit a924357a13
1 changed files with 12 additions and 8 deletions
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20
backend/src/schema/resolvers/groups.js
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@ -260,9 +260,10 @@ export default {
const writeTxResultPromise = session.writeTransaction(async (transaction) => {
const leaveGroupCypher = `
MATCH (member:User {id: $userId})-[membership:MEMBER_OF]->(group:Group {id: $groupId})
OPTIONAL MATCH (post:Post)-[:IN]->(group)
MERGE (member)-[:CANNOT_SEE]->(post)
DELETE membership
WITH member, group
FOREACH (post IN [(p:Post)-[:IN]->(group) | p] |
MERGE (member)-[:CANNOT_SEE]->(post))
RETURN member {.*, myRoleInGroup: NULL}
`
@ -285,18 +286,20 @@ export default {
let postRestrictionCypher = ''
if (['owner', 'admin', 'usual'].includes(roleInGroup)) {
postRestrictionCypher = `
OPTIONAL MATCH (member)-[restriction:CANNOT_SEE]->(post:Post)-[:IN]->(group)
DELETE restriction`
WITH group, member, membership
FOREACH (restriction IN [(member)-[r:CANNOT_SEE]->(:Post)-[:IN]->(group) | r] |
DELETE restriction)`
} else {
// user becomes pending member
postRestrictionCypher = `
OPTIONAL MATCH (post:Post)-[:IN]->(group)
MERGE (member)-[:CANNOT_SEE]->(post)`
WITH group, member, membership
FOREACH (post IN [(p:Post)-[:IN]->(group) | p] |
MERGE (member)-[:CANNOT_SEE]->(post))`
}
const joinGroupCypher = `
MATCH (member:User {id: $userId}), (group:Group {id: $groupId})
${postRestrictionCypher}
MATCH (member:User {id: $userId})
MATCH (group:Group {id: $groupId})
MERGE (member)-[membership:MEMBER_OF]->(group)
ON CREATE SET
membership.createdAt = toString(datetime()),
@ -305,6 +308,7 @@ export default {
ON MATCH SET
membership.updatedAt = toString(datetime()),
membership.role = $roleInGroup
${postRestrictionCypher}
RETURN member {.*, myRoleInGroup: membership.role}
`