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From "Suraj Acharya (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AVRO-1886) Improve error reporting for schema validation
Date Wed, 30 Nov 2016 00:28:58 GMT

    [ https://issues.apache.org/jira/browse/AVRO-1886?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15707037#comment-15707037
] 

Suraj Acharya commented on AVRO-1886:
-------------------------------------

{code}
+1 overall

| Vote |      Subsystem |  Runtime   | Comment
============================================================================
|   0  |        reexec  |   1m 23s   | Docker mode activated.
|  +1  |       @author  |   0m  0s   | The patch does not contain any @author
|      |                |            | tags.
|  +1  |     buildtest  |   0m  0s   | master passed
|  +1  |    whitespace  |   0m  1s   | The patch has no whitespace issues.
|  +1  |     buildtest  |   0m  7s   | the patch passed
|      |                |   1m 43s   |
{code}

> 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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