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Here i'm using firestore query to update, insert data. How to upadate dictionary of array value to firebase database.

here is my firestore data structure: enter image description here

Right now able to get data of slot1 -> 0th position value in a model class. how can i update value of slot1 0th position of isbooked boolean value alone, without affecting remaining values and other slot.

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You can't without reading the entire document, modifying the array data in memory, then updating the entire array field back out do the document. The smallest unit of change in a Firestore array field is an entire field. You can't make smaller changes to individual elements of a field, except those defined by arrayUnion and arrayRemove (which are not compatible with what you're trying to do here).

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do you mean the whole slotName dictionary or slot1 arrray? can you help me out of this?
The array. I already said what you have to do - read the document, make changes in memory, write the field back out.
@Mac_Play still i didnt find answer for this. So i asked backend developer to update it
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You can do that by getting the exact id of your structure ..

Database.database().reference().child("SlotName").child(yourAry.key).child(yourAry.key).child("isbooked").setValue(true/false)

Manage your database structure accordingly, its just an example and as user Doug suggested have a look on docs too ..

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