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Use pointers for optional datatypes. Use arrays for fixed size sets #204

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merged 2 commits into from
Aug 3, 2021
Merged

Use pointers for optional datatypes. Use arrays for fixed size sets #204

merged 2 commits into from
Aug 3, 2021

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dave-tucker
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This PR changes:

  1. Modelgen to generate pointers to an atomic type when it is a set with a min value of 0 and a max value of 1
  2. Modelgen to generate arrays for fixed size sets (e.g max != unlimited)
  3. Bindings to cope with these new types

Fixes: #191

@dave-tucker
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Split from #151

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coveralls commented Jul 19, 2021 •
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Pull Request Test Coverage Report for Build 1090436413

  • 59 of 105 (56.19%) changed or added relevant lines in 3 files are covered.
  • 6 unchanged lines in 3 files lost coverage.
  • Overall coverage decreased (-0.7%) to 75.654%
Changes Missing Coverage Covered Lines Changed/Added Lines %
ovsdb/set.go 12 13 92.31%
modelgen/table.go 7 17 41.18%
ovsdb/bindings.go 40 75 53.33%
Files with Coverage Reduction New Missed Lines %
ovsdb/bindings.go 1 74.93%
ovsdb/set.go 1 86.76%
modelgen/table.go 4 88.29%
Totals Coverage Status
Change from base Build 1076496319: -0.7%
Covered Lines: 3325
Relevant Lines: 4395
💛 - Coveralls

@dave-tucker dave-tucker mentioned this pull request Jul 29, 2021
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@alexanderConstantinescu
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  1. Modelgen to generate pointers to an atomic type when it is a set with a min value of 0 and a max value of 1

How come a pointer to an atomic type and not the atomic type itself? That enforces "strange looking code" on the client, such as:

nyName := "acl"
acl := nbdb.ACL{
     Name: &myName
}

I would just like to understand why that should be the case here.

@dave-tucker
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@alexanderConstantinescu because the field needs to be nillable as its optional. Otherwise we end up with serialisation problems.

jcaamano
jcaamano requested changes Jul 29, 2021
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I have not spotted anything weird code wise, just formatting nits.

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amorenoz
amorenoz reviewed Jul 29, 2021
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For users not using modelgen I think we should add a brief comment on some of the documentation (maybe api/doc.go or main Readme.md)

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@dave-tucker
modelgen: Add constraints to sets
c68cba9 
Sets with min 1 and max 1 are a type
Sets with min 0 and max 1 are a pointer to a type
Sets with a max > 1 (non-default) are an array
Otherwise a set is represented by a slice

Signed-off-by: Dave Tucker <[email protected]>
@dave-tucker
bindings: Update to support new constraints
8f86fcb 
This handles mapping from OvsToNative

- min 0, max > 1 && !unlimted to an array
- min 0, max 1 to a pointer
- min 0, max unlimited to a slice

And in NativeToOvs, we convert all cases back in to an
OvsSet

Signed-off-by: Dave Tucker <[email protected]>
@dave-tucker dave-tucker merged commit 94fe2cd into ovn-org:main Aug 3, 2021
@flavio-fernandes flavio-fernandes mentioned this pull request Aug 23, 2021
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@jcaamano jcaamano jcaamano requested changes

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Encode sets with max=1 as pointers
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@dave-tucker @coveralls @alexanderConstantinescu @jcaamano @amorenoz