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arrayFormat for parse #329

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dreyks
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@dreyks dreyks commented Sep 6, 2019

added basic tests. without arrayFormat parse's behavior does not change

don't think we want to allow specifying several formats simultaneously?

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ljharb commented Sep 8, 2019

Are these tests expected to pass as-is, or fail?

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dreyks commented Sep 8, 2019

they’re expected to fail. i just wanted to be sure that this is the behavior we want. if you’re ok with it - i’ll proceed to the implementation

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ljharb commented Sep 8, 2019

@dreyks i think it would be helpful to have two commits - one with passing tests, and another with the tests that fail. It makes it much easier for me to see what's breaking or not, and what requires a new option or not.

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dreyks commented Sep 8, 2019

oh. gotcha. ok will do

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dreyks commented Sep 8, 2019

done

@@ -34,17 +34,31 @@ test('parse()', function (t) {

t.test('arrayFormat: brackets allows only explicit arrays', function (st) {
st.deepEqual(qs.parse('a[]=b&a[]=c', { arrayFormat: 'brackets' }), { a: ['b', 'c'] });
st.deepEqual(qs.parse('a[0]=b&a[1]=c', { arrayFormat: 'brackets' }), { 'a[0]': 'b', 'a[1]': 'c' });
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i see how this seems correct, because it's currently set to brackets but is parsing indices.

However, the current behavior matches what PHP, Rails, and express all do, so I'm not sure it should change.

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@dreyks dreyks Sep 21, 2019

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yeah, i'm not very sure on this one too, though you have to explicitly state you want this behavior so maybe it's ok

alternatively allowing arrayFormat to be an array itself could solve it

t.deepEqual(qs.parse('a[0]=b&a[1]=c', { arrayFormat: ['brackets', 'indices'] }), { 'a': ['b',  'c'] });
t.deepEqual(qs.parse('a[]=b&a[]=c', { arrayFormat: ['brackets', 'indices'] }), { 'a': ['b',  'c'] });

st.deepEqual(qs.parse('a=b,c', { arrayFormat: 'brackets' }), { a: 'b,c' });
st.deepEqual(qs.parse('a=b&a=c', { arrayFormat: 'brackets' }), { a: ['b', 'c'] });
st.deepEqual(qs.parse('a=b&a=c', { arrayFormat: 'brackets' }), { a: 'c' });
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i see how this seems correct, because it's currently set to brackets but is parsing as repeat.

However, the current behavior matches what PHP, Rails, and express all do, so I'm not sure it should change.

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Rails and PHP actually parse it as overwriting

this is the reason I've started all this: in my rails app I've switched from "chaos and anarchy " to qs and got one spec failure where the suite was appending params and with qs that lead to an array

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hmm, thanks for correcting me then. i'll think on this one.

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ljharb commented Sep 14, 2023

@dreyks ok, so, here's how i think this needs to work:

  • arrayFormat must take all the options stringify does - brackets, indices, repeat, comma - and produce an object that, when re-stringified with the same format, produces the original parse input (ie, roundtripping)
  • The current behavior must be described by one of the arrayFormat options. if none of the 4 formats above match, we may need to make a 5th one.

One important goal is that the default behavior of Rails, PHP, and express should all be expressible with an option - ideally the same one, and I suspect that's "brackets".

It'd be great to get this revived :-)

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dreyks commented Sep 15, 2023

oof, lemme recollect what's going on here, it's been 4 years and not the easiest ones :D

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3 participants