{"action":"created","issue":{"url":"https://api.github.com/repos/marshmallow-code/marshmallow/issues/753","repository_url":"https://api.github.com/repos/marshmallow-code/marshmallow","labels_url":"https://api.github.com/repos/marshmallow-code/marshmallow/issues/753/labels{/name}","comments_url":"https://api.github.com/repos/marshmallow-code/marshmallow/issues/753/comments","events_url":"https://api.github.com/repos/marshmallow-code/marshmallow/issues/753/events","html_url":"https://github.com/marshmallow-code/marshmallow/issues/753","id":305916430,"number":753,"title":"pre_load and ValidationError","user":{"login":"yamila-moreno","id":3340793,"avatar_url":"https://avatars3.githubusercontent.com/u/3340793?v=4","gravatar_id":"","url":"https://api.github.com/users/yamila-moreno","html_url":"https://github.com/yamila-moreno","followers_url":"https://api.github.com/users/yamila-moreno/followers","following_url":"https://api.github.com/users/yamila-moreno/following{/other_user}","gists_url":"https://api.github.com/users/yamila-moreno/gists{/gist_id}","starred_url":"https://api.github.com/users/yamila-moreno/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/yamila-moreno/subscriptions","organizations_url":"https://api.github.com/users/yamila-moreno/orgs","repos_url":"https://api.github.com/users/yamila-moreno/repos","events_url":"https://api.github.com/users/yamila-moreno/events{/privacy}","received_events_url":"https://api.github.com/users/yamila-moreno/received_events","type":"User","site_admin":false},"labels":[{"id":65183470,"url":"https://api.github.com/repos/marshmallow-code/marshmallow/labels/question","name":"question","color":"cc317c","default":true}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2018-03-16T12:52:07Z","updated_at":"2018-03-16T13:08:02Z","closed_at":null,"author_association":"NONE","body":"Hi there!\r\nI'm a happy user of marshmallow library, it's awesome and  you rock :)\r\n\r\nI'm having issues with the pre_load method and the ValidationError. I've written an example to show my problem. (As github doesn't allow to upload `.py` files, you need to download and rename it to .py and execute with python3). Besides, I'm using this version of the library:\r\n\r\n```\r\nmarshmallow==2.15.0\r\n```\r\n\r\nI need to make two validations before loading, both of them separetly, and both of them can add a new error to the output; but as it's done, I can only add one of them. Could you provide any hint on how to proceed? thank you very much!\r\n\r\n\r\n[pruebam.txt](https://github.com/marshmallow-code/marshmallow/files/1819193/pruebam.txt)\r\n"},"comment":{"url":"https://api.github.com/repos/marshmallow-code/marshmallow/issues/comments/373707778","html_url":"https://github.com/marshmallow-code/marshmallow/issues/753#issuecomment-373707778","issue_url":"https://api.github.com/repos/marshmallow-code/marshmallow/issues/753","id":373707778,"user":{"login":"lafrech","id":1767010,"avatar_url":"https://avatars0.githubusercontent.com/u/1767010?v=4","gravatar_id":"","url":"https://api.github.com/users/lafrech","html_url":"https://github.com/lafrech","followers_url":"https://api.github.com/users/lafrech/followers","following_url":"https://api.github.com/users/lafrech/following{/other_user}","gists_url":"https://api.github.com/users/lafrech/gists{/gist_id}","starred_url":"https://api.github.com/users/lafrech/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/lafrech/subscriptions","organizations_url":"https://api.github.com/users/lafrech/orgs","repos_url":"https://api.github.com/users/lafrech/repos","events_url":"https://api.github.com/users/lafrech/events{/privacy}","received_events_url":"https://api.github.com/users/lafrech/received_events","type":"User","site_admin":false},"created_at":"2018-03-16T13:08:02Z","updated_at":"2018-03-16T13:08:02Z","author_association":"COLLABORATOR","body":"Hi. You might get more help if you edit your question and copy-paste your sample code in it, mark it as code (`<>` button above) and try to trim it to a minimal use case if it is too big."}}
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