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fix: g + vertices(1, 2, foo = 3) works again, regression introduced in igraph 2.0.0 #1247

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merged 7 commits into from
Feb 13, 2024

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maelle
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@maelle maelle commented Feb 12, 2024

Fix #1231

Partly refactoring for understanding for now.

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R/operators.R Outdated Show resolved Hide resolved
R/operators.R Outdated
names(e2)[wn] <- "name"
unnamed_elements_indices <- which(!rlang::have_name(e2))
if (length(unnamed_elements_indices) == 1) {
e2 <- rlang::set_names(e2[unnamed_elements_indices], "name")
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I guess the readability of this line is not obviously better but since I was using rlang above...

R/operators.R Outdated
} else if (is.null(names(e2))) {
## No names at all, everything is a vertex name
e2 <- list(name = unlist(e2, recursive = FALSE))
} else if (length(wn) == 0) {
} else if (length(unnamed_elements_indices) == 0) {
## If there are no non-named arguments, we are fine
} else {
## Otherwise, all unnamed arguments are collected and used as
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this is the case that was broken as far as I understand. Not sure why it works to fix it here.

}
la <- unique(sapply(e2, length))
res <- add_vertices(e1, la, attr = e2)
# When adding vertices via +, all unnamed arguments are interpreted as vertex names of the new vertices.
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this comes from the docs

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maelle commented Feb 12, 2024

library("igraph")
#> 
#> Attaching package: 'igraph'
#> The following objects are masked from 'package:stats':
#> 
#>     decompose, spectrum
#> The following object is masked from 'package:base':
#> 
#>     union

g <- make_empty_graph(1)
g
#> IGRAPH bd455eb D--- 1 0 -- 
#> + edges from bd455eb:
V(g)
#> + 1/1 vertex, from bd455eb:
#> [1] 1

g <- g +
  vertices("a", "b", foo = 5)
g
#> IGRAPH 34a9a54 DN-- 3 0 -- 
#> + attr: name (v/c), foo (v/n)
#> + edges from 34a9a54 (vertex names):
V(g)
#> + 3/3 vertices, named, from 34a9a54:
#> [1] <NA> a    b
V(g)$foo
#> [1] NA  5  5

Created on 2024-02-12 with reprex v2.1.0

@maelle maelle marked this pull request as ready for review February 12, 2024 14:45
}
la <- unique(sapply(e2, length))
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why was this supposed to be nv? I think my change here is the fix.

@maelle maelle marked this pull request as draft February 12, 2024 14:54
@maelle maelle marked this pull request as ready for review February 12, 2024 15:09
@maelle maelle requested a review from krlmlr February 12, 2024 15:54
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Thanks. Since we obviously didn't have any tests, can you please add some?

expect_s3_class(V(g_all_unnamed), "igraph.vs")
expect_identical(V(g_all_unnamed)$name, c( NA, "a", "b"))

g_mix_named_unnamed <- g + vertices("a", "b", foo = 5)
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What happens with foo = 6:7 and foo = 8:10 ?

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I added a test. The error also happens with v1.6.0 and seems logical.

@maelle maelle marked this pull request as draft February 13, 2024 08:31
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maelle commented Feb 13, 2024

I added a test but I'm surprised I need to use unname(), is something wrong:

library("igraph")
#> 
#> Attaching package: 'igraph'
#> The following objects are masked from 'package:stats':
#> 
#>     decompose, spectrum
#> The following object is masked from 'package:base':
#> 
#>     union

g <- make_empty_graph(1)
g
#> IGRAPH ea2b4e5 D--- 1 0 -- 
#> + edges from ea2b4e5:
V(g)
#> + 1/1 vertex, from ea2b4e5:
#> [1] 1

g <- g +
  vertices("a", "b", foo = 5)
g
#> IGRAPH 6aaaab9 DN-- 3 0 -- 
#> + attr: name (v/c), foo (v/n)
#> + edges from 6aaaab9 (vertex names):
V(g)
#> + 3/3 vertices, named, from 6aaaab9:
#> [1] <NA> a    b
V(g)$name
#> <NA> <NA> <NA> 
#>   NA  "a"  "b"
V(g)$foo
#> [1] NA  5  5

Created on 2024-02-13 with reprex v2.1.0

And with v1.6.0, it's the same actually

library("igraph")
#> 
#> Attaching package: 'igraph'
#> The following objects are masked from 'package:stats':
#> 
#>     decompose, spectrum
#> The following object is masked from 'package:base':
#> 
#>     union

g <- make_empty_graph(1)
g
#> IGRAPH c331734 D--- 1 0 -- 
#> + edges from c331734:
V(g)
#> + 1/1 vertex, from c331734:
#> [1] 1

g <- g +
  vertices("a", "b", foo = 5)
g
#> IGRAPH dc14fb9 DN-- 3 0 -- 
#> + attr: name (v/c), foo (v/n)
#> + edges from dc14fb9 (vertex names):
V(g)
#> + 3/3 vertices, named, from dc14fb9:
#> [1] <NA> a    b
V(g)$name
#> <NA> <NA> <NA> 
#>   NA  "a"  "b"
V(g)$foo
#> [1] NA  5  5

Created on 2024-02-13 with reprex v2.1.0

We can discuss later today. 😸

@maelle maelle marked this pull request as ready for review February 13, 2024 08:39
@maelle maelle marked this pull request as draft February 13, 2024 08:39
@krlmlr krlmlr changed the title fix: make vertices(1, 2, foo = 3) work again fix: Adding vertices(1, 2, foo = 3) works again, regression introduced in igraph 2.0.0 Feb 13, 2024
@krlmlr krlmlr marked this pull request as ready for review February 13, 2024 14:27
@krlmlr krlmlr changed the title fix: Adding vertices(1, 2, foo = 3) works again, regression introduced in igraph 2.0.0 fix: g + vertices(1, 2, foo = 3) works again, regression introduced in igraph 2.0.0 Feb 13, 2024
@aviator-app aviator-app bot merged commit dfdc345 into main Feb 13, 2024
14 checks passed
@aviator-app aviator-app bot deleted the vertices branch February 13, 2024 14:58
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vertices(1, 2, foo = 3) no longer works
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