How can i update or delete an object in an array in firestore with swift?

[azim vaziri]

I want to update a field of an object that the object is into an array in firestore database with swift 4. These two function (arrayUnion() and arrayRemove() ) are not working for me.
Please help me.

[Kato Richardson]

Azim, it's going to be hard to guess what's going wrong without more context. Could you provide some code and sample data that reproduces the error, along with detailed logging and errors you're encountering? See this link for more help on asking effective troubleshooting questions: http://stackoverflow.com/help/mcve

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Kato Richardson |

Developer Programs Eng |

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775-235-8398

[Nate Park]

I hope this thread is still available. I actually have the same question as Azim, so I'd like to add some more details to it (Swift & Firestore). 

My Cloud Firestore's chat collection has a nested array called 'messages'.

Chat collection: [
     "chatMember": ["member1", "member2"],
     "createdAt" : Date().timeIntervalSince1970,
     "meesages" : []
]

My goal is to append objects, aka Dictionary ([String: Any]) into the messages array.

Firestore document <Link> introduces FieldValue.arrayUnion() & .arrayRemove() to update elements in an array.

But this doesn't work on Swift with an error saying, "Contextual type '[Any]' cannot be used with dictionary literal".

I saw a Youtube video that uses the .arrayUnion method with Angular and it works perfectly, but Swift doesn't work when I try to do the same. 

I hope my explanation clears your confusion and I very much look forward to hearing back from you Kato.

Thank you in advance for your help.

On Tuesday, May 14, 2019 at 2:26:27 PM UTC-4, Kato Richardson wrote:

Azim, it's going to be hard to guess what's going wrong without more context. Could you provide some code and sample data that reproduces the error, along with detailed logging and errors you're encountering? See this link for more help on asking effective troubleshooting questions: http://stackoverflow.com/help/mcve

From: azim vaziri <azimv...@gmail.com>
Date: Mon, May 13, 2019 at 4:32 PM
To: Firebase Google Group

I want to update a field of an object that the object is into an array in firestore database with swift 4. These two function (arrayUnion() and arrayRemove() ) are not working for me.
Please help me.

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Kato Richardson |

Developer Programs Eng |

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775-235-8398

https://firebase.google.com/docs/firestore/manage-data/add-data?authuser=0#update_elements_in_an_array