Fields issue on preload entity

[BenWaNH]

Hi!
I'm playing with Vulcain but i'm facing to an issue...
I've 2 entities in an Api Platform project (greeting and author, author have many greetings, for relationship)

If i fetch greetings endpoint:

window.fetch('https://localhost/greetings', {
        headers: {
            preload: '"/hydra:member/*/author"',
            fields: '"/hydra:member/*/@id", "/hydra:member/*/name", "/hydra:member/*/author/@id"'
        }
    }).then(() => window.fetch('https://localhost/authors/1'))

Of course authors/1 exists and it linked to all my greetings for more simplicity.

So... In this case, with fields contains "/hydra:member/*/authors/@id" (it the same with firstname or anyother property) push doesn't work

But if instead "/hydra:member/*/authors/@id", i've "/hydra:member/*/authors" (without /@id) push works (but i get full object after, of course)

What am i missing....? Documentation seems clear about, i think this should work...

[dunglas]

Could you paste the JSON documents you request, please?

[BenWaNH]

Hi @dunglas
Thanks for your time!
This is a screen of my output greetings

And the author

I tried more since my last post, it seems to work if Fields header match between author et greetings, what i mean, if for my get of authors/1 i've this:

.then(() => window.fetch('https://localhost/authors/1', {
        headers: {
            fields: '"/@id"'
        }
    })

I see this with query parameters example, so i thinks i should reporter "/hydra:member/*/author/@id" to /@id when i fetch him. Isn't it? So, why not, it works!

However, I don't know how to make work with a new level after (in my exemple, authors have comments)
So, i tried:

window.fetch('https://localhost/greetings?'/*+encodeURI('fields="/hydra:member/!*!/@id"&fields="/hydra:member/!*!/name"&fields="/hydra:member/!*!/author/firstName"')*/, {
        headers: {
            preload: '"/hydra:member/*/author/comments/*"',
            fields: '"/hydra:member/*/@id", "/hydra:member/*/name", "/hydra:member/*/author/@id", "/hydra:member/*/author/firstName", "/hydra:member/*/author/comments/*/@id"'
        }
    }).then(() => window.fetch('https://localhost/authors/1', {
        headers: {
            fields: '"/@id", "/firstName"'
        }
    }).then(() => window.fetch('https://localhost/comments/1', {
        headers: {
            fields: '"/@id"'
        }
    }))
    )

Good fields are displayed


but, no push...

I tried many case, but either i've good fields or push but never both :'(

I saw this syntax in your demo symfo repo:

const conferences = await fetchJson('/conferences', { headers: { Preload: "/hydra:member/*/@id/sessions/*/feedback/*" }});

I don't understand this syntax with the @id before sessions, but when i tried, all my next calls are push but without fields....

Do you have a full example somewhere with multi level and fields headers?

Thanks

[BenWaNH]

Hi @dunglas ,
sorry to come back, i know you're busy.

Just, do you know if is it possible to combine Fields and Preload to a nested level of relationship with current version of Vulcain?! Or i miss something that i misunderstand
Push is stopped after 1st level if i add fields (if i comment adding Fields all is pushed but without picked fields)
My last js script with query mode :

    let url = 'https://localhost/greetings?'
    // url += encodeURI('preload="/hydra:member/*/@id/author/comments/*"')
    // url += encodeURI('preload="/hydra:member/*/author/comments/*"')
    url += encodeURI('preload="/hydra:member/*/author"&preload="/hydra:member/*/author/comments/*"')
    url += encodeURI('&fields="/hydra:member/*/@id"&fields="/hydra:member/*/name"&fields="/hydra:member/*/author/@id"&fields="/hydra:member/*/author/firstName"&fields="/hydra:member/*/author/comments/*/@id"')
    // url += encodeURI('&fields="/hydra:member/*/@id"&fields="/hydra:member/*/name"&fields="/hydra:member/*/author/firstName"&fields="/hydra:member/*/author/comments/*/@id"')
    // url += encodeURI('fields="/hydra:member/*/@id"&fields="/hydra:member/*/name"')

    window.fetch(url).then(async (response) => {
        const json = await response.json()
        const greetings = json['hydra:member']
            window.fetch(greetings[0]['author'])
                .then(async(reponse2) => {
                    const author = await reponse2.json()
                    window.fetch(author.comments[0])
                })
    }
    )

My greetings collection:

{
    "hydra:member": [
        {
            "author": "/authors/1?fields=%22%2Fcomments%2F%2A%2F%40id%22%2C+%22%2F%40id%22%2C+%22%2FfirstName%22",
            "@id": "/greetings/1",
            "name": "TestABC"
        },
        {
            "author": "/authors/1?fields=%22%2Fcomments%2F%2A%2F%40id%22%2C+%22%2F%40id%22%2C+%22%2FfirstName%22",
            "@id": "/greetings/7",
            "name": "AAA"
        },
        {
            "author": "/authors/1?fields=%22%2Fcomments%2F%2A%2F%40id%22%2C+%22%2F%40id%22%2C+%22%2FfirstName%22",
            "@id": "/greetings/8",
            "name": "fdgfdg"
        },
        {
            "author": "/authors/1?fields=%22%2Fcomments%2F%2A%2F%40id%22%2C+%22%2F%40id%22%2C+%22%2FfirstName%22",
            "@id": "/greetings/9",
            "name": "CCC"
        },
        {
            "author": "/authors/1?fields=%22%2Fcomments%2F%2A%2F%40id%22%2C+%22%2F%40id%22%2C+%22%2FfirstName%22",
            "@id": "/greetings/10",
            "name": "123456"
        }
    ]
}

My author (pushed)

{
  "comments": [
    "/comments/1?fields=%22%2F%40id%22"
  ],
  "@id": "/authors/1",
  "firstName": "BenWa"
}

My comment (not push but good fields)

{
  "@id": "/comments/1"
}

Thanks for your time.

BenWa