Flutter Firestore where clause using map

When a new activity is posted i add a new post document into the collection.
Inside this document i have a map where users add confirmation to the event marking it as true and adding his own id.

Firestore Screen

var snap = await Firestore.instance

        .collection('user_posts')        

        .where("confirmations.${user.id}",isEqualTo: true)

        .getDocuments();

With this snippet i'm able to get all the posts confirmed by the user. The issue here is to get this a index is required to perform this query. And this index can't be generic. I can't create a index for each user.

Some idea of how to get it?

Thanks!!

edited Jan 2 at 20:20

Frank van Puffelen

244k29387415

asked Jan 2 at 19:56

Kaboom

539

add a comment |

When a new activity is posted i add a new post document into the collection.
Inside this document i have a map where users add confirmation to the event marking it as true and adding his own id.

Firestore Screen

var snap = await Firestore.instance

        .collection('user_posts')        

        .where("confirmations.${user.id}",isEqualTo: true)

        .getDocuments();

Some idea of how to get it?

Thanks!!

edited Jan 2 at 20:20

Frank van Puffelen

244k29387415

asked Jan 2 at 19:56

Kaboom

539

add a comment |

When a new activity is posted i add a new post document into the collection.
Inside this document i have a map where users add confirmation to the event marking it as true and adding his own id.

Firestore Screen

var snap = await Firestore.instance

        .collection('user_posts')        

        .where("confirmations.${user.id}",isEqualTo: true)

        .getDocuments();

Some idea of how to get it?

Thanks!!

edited Jan 2 at 20:20

Frank van Puffelen

244k29387415

asked Jan 2 at 19:56

Kaboom

539

When a new activity is posted i add a new post document into the collection.
Inside this document i have a map where users add confirmation to the event marking it as true and adding his own id.

Firestore Screen

var snap = await Firestore.instance

        .collection('user_posts')        

        .where("confirmations.${user.id}",isEqualTo: true)

        .getDocuments();

Some idea of how to get it?

Thanks!!

firebase flutter google-cloud-firestore

edited Jan 2 at 20:20

Frank van Puffelen

244k29387415

asked Jan 2 at 19:56

Kaboom

539

edited Jan 2 at 20:20

Frank van Puffelen

244k29387415

asked Jan 2 at 19:56

Kaboom

539

edited Jan 2 at 20:20

Frank van Puffelen

244k29387415

edited Jan 2 at 20:20

Frank van Puffelen

244k29387415

edited Jan 2 at 20:20

Frank van Puffelen

244k29387415

asked Jan 2 at 19:56

Kaboom

539

asked Jan 2 at 19:56

Kaboom

539

asked Jan 2 at 19:56

Kaboom

539

add a comment |

1 Answer
1

active

oldest

votes

You'll want to turn the confirmations field into an array, and use the (relatively recent) array-contains and arrayUnion operations.

The equivalent query with an array like that would become:

var snap = await Firestore.instance

    .collection('user_posts')        

    .where("confirmations", arrayContains: user.id)

    .getDocuments();

And this way you only need an index on confirmations, which is added automatically.

For more on these see:

the blog post introducing these operations

the documentation on updating arrays

the documentation on array membership queries

edited Jan 2 at 21:59

diegoveloper

14.1k12534

answered Jan 2 at 20:20

Frank van Puffelen

244k29387415

add a comment |

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

You'll want to turn the confirmations field into an array, and use the (relatively recent) array-contains and arrayUnion operations.

The equivalent query with an array like that would become:

var snap = await Firestore.instance

    .collection('user_posts')        

    .where("confirmations", arrayContains: user.id)

    .getDocuments();

And this way you only need an index on confirmations, which is added automatically.

For more on these see:

the blog post introducing these operations

the documentation on updating arrays

the documentation on array membership queries

edited Jan 2 at 21:59

diegoveloper

14.1k12534

answered Jan 2 at 20:20

Frank van Puffelen

244k29387415

add a comment |

You'll want to turn the confirmations field into an array, and use the (relatively recent) array-contains and arrayUnion operations.

The equivalent query with an array like that would become:

var snap = await Firestore.instance

    .collection('user_posts')        

    .where("confirmations", arrayContains: user.id)

    .getDocuments();

And this way you only need an index on confirmations, which is added automatically.

For more on these see:

the blog post introducing these operations

the documentation on updating arrays

the documentation on array membership queries

edited Jan 2 at 21:59

diegoveloper

14.1k12534

answered Jan 2 at 20:20

Frank van Puffelen

244k29387415

add a comment |

You'll want to turn the confirmations field into an array, and use the (relatively recent) array-contains and arrayUnion operations.

The equivalent query with an array like that would become:

var snap = await Firestore.instance

    .collection('user_posts')        

    .where("confirmations", arrayContains: user.id)

    .getDocuments();

And this way you only need an index on confirmations, which is added automatically.

For more on these see:

the blog post introducing these operations

the documentation on updating arrays

the documentation on array membership queries

edited Jan 2 at 21:59

diegoveloper

14.1k12534

answered Jan 2 at 20:20

Frank van Puffelen

244k29387415

You'll want to turn the confirmations field into an array, and use the (relatively recent) array-contains and arrayUnion operations.

The equivalent query with an array like that would become:

var snap = await Firestore.instance

    .collection('user_posts')        

    .where("confirmations", arrayContains: user.id)

    .getDocuments();

And this way you only need an index on confirmations, which is added automatically.

For more on these see:

the blog post introducing these operations

the documentation on updating arrays

the documentation on array membership queries

edited Jan 2 at 21:59

diegoveloper

14.1k12534

answered Jan 2 at 20:20

Frank van Puffelen

244k29387415

edited Jan 2 at 21:59

diegoveloper

14.1k12534

edited Jan 2 at 21:59

diegoveloper

14.1k12534

edited Jan 2 at 21:59

diegoveloper

14.1k12534

answered Jan 2 at 20:20

Frank van Puffelen

244k29387415

answered Jan 2 at 20:20

Frank van Puffelen

244k29387415

answered Jan 2 at 20:20

Frank van Puffelen

244k29387415

add a comment |

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