Support foreign key checks and dereferencing

[roll]

Overview

This issue is not a part of first iteration of work and created for a future implementation if possible

See - https://github.com/frictionlessdata/datapackage-js#foreign-keys

[kleanthisk10]

Is this issue referring to these functions?

• https://github.com/frictionlessdata/datapackage-r/blob/master/R/helpers.R#L350
• https://github.com/frictionlessdata/datapackage-r/blob/master/R/helpers.R#L366

Where applied in this section:

• https://github.com/frictionlessdata/datapackage-r/blob/master/R/resource.R#L422

And the new tests:

• https://github.com/frictionlessdata/datapackage-r/blob/master/tests/testthat/test-resource.R#L271
• https://github.com/frictionlessdata/datapackage-r/blob/master/tests/testthat/test-resource.R#L303
• https://github.com/frictionlessdata/datapackage-r/blob/master/tests/testthat/test-resource.R#L333
• https://github.com/frictionlessdata/datapackage-r/blob/master/tests/testthat/test-resource.R#L363
• https://github.com/frictionlessdata/datapackage-r/blob/master/tests/testthat/test-resource.R#L669
• https://github.com/frictionlessdata/datapackage-r/blob/master/tests/testthat/test-resource.R#L648
• https://github.com/frictionlessdata/datapackage-r/blob/master/tests/testthat/test-resource.R#L678

[roll]

Hi @kleanthisk10, sorry it's hard for me to understand R code but the issue is about - https://github.com/frictionlessdata/datapackage-js#working-with-foreign-keys

[kleanthisk10]

Yes it's supported!

[roll]

@kleanthisk10 awesome :+1: