Solution 1

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title Solução 1
participant post-api
participant material-upload-api
participant database
post-api->database:start transaction
post-api<--database:transaction started
post-api->database:insert post info
post-api<--database:post info inserted
space
post-api->material-upload-api:upload material
material-upload-api->database:start transaction
material-upload-api<--database:transaction started
material-upload-api->database: insert material info
material-upload-api<--database: material info inserted
material-upload-api->database: end transaction
material-upload-api<--database: transaction ended
post-api<--material-upload-api: material uploaded
space
post-api->database: insert relationship
post-api<--database:relationship inserted
post-api->database:end transaction
post-api<--database: transaction ended