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From "David Lantos (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AVRO-1886) Improve error reporting for schema validation
Date Thu, 25 Aug 2016 11:30:22 GMT

    [ https://issues.apache.org/jira/browse/AVRO-1886?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15436696#comment-15436696
] 

David Lantos commented on AVRO-1886:
------------------------------------

Is there anything we (Funding Circle) would need to do to progress this ticket?

> Improve error reporting for schema validation
> ---------------------------------------------
>
>                 Key: AVRO-1886
>                 URL: https://issues.apache.org/jira/browse/AVRO-1886
>             Project: Avro
>          Issue Type: Improvement
>          Components: ruby
>            Reporter: Miroslav Csonka
>            Assignee: Miroslav Csonka
>             Fix For: 1.9.0, 1.8.2
>
>
> In Funding Circle we use avro schema to validate some financial data and we've found
ourselves wondering what is invalid. We've noticed that avro [does already validation|https://github.com/apache/avro/blob/master/lang/ruby/lib/avro/schema.rb#L94],
but does not report what fields are invalid, so we've decided to change it and we use Avro
as a validation library.
> h5. What error messages to expect?
> We communicate errors for a given payload in format "at <path> <expected>
<received>".
> For <path> we've decided to use syntax similar to json path:
> * . refers to root
> * \[0\] first index in array
> * .age would match 42 from {"age": 42}
> Error within object *person* and his optional array *houses* on *second item* with key
*number_of_rooms*:
> {quote}
>     at .person.houses\[1\].number_of_rooms expected type long, got string with value
"not valid at all"
> {quote}
> Example of multiple errors for a single payload:
> {quote}
>     at .\[0\] expected type int, got null
>     at .\[1\] expected type int, got string with value \"e\"
> {quote}
> More examples can be seen at https://github.com/apache/avro/pull/111/files#diff-830ac80276854fceefa3f92c346d165f



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