16. Firebase Cloud Firestore
Written by Stef Patterson & Kevin D Moore

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When you want to store information for many people, you can’t realistically store it on one person’s phone. It has to be stored in the cloud. You could hire a team of developers to design and implement a backend system that connects to a database via a set of APIs. But, this could take months. Wouldn’t it be great if you could just connect to an existing system?

This is where Firebase Cloud Firestore comes in. You no longer need to write complicated apps that use thousands of lines of async tasks and threaded processes to simulate reactiveness. With Cloud Firestore, you’ll be up and running in no time.

In this chapter, you’ll add an instant messaging feature to the Yummy app.

While adding this feature, you’ll learn:

About Cloud Firestore and when to use it.

The steps required to set up a Firebase project with the Cloud Firestore.

How to set up user authentication.

How to connect to, query and populate the Cloud Firestore.

How to use the Cloud Firestore to build your own instant messaging app.

Getting Started

First, open the starter project from this chapter’s project materials and run flutter pub get.

Next, build and run your project. You’ll see the Yummy app’s Chat tab.

Right now, your app doesn’t do much, but when you’re done, you’ll know how to use Cloud Firestore to send and receive messages.

What is Cloud Firestore?

Google has two NoSQL document databases within the Firebase suite of tools: Realtime Database and Cloud Firestore. But what’s the difference?

Setting Up a Firebase Project

Before you can use any of Google’s Cloud services, you have to create a project on the Firebase Console.

Installing Firebase CLI

What is Firebase CLI? It’s a Firebase management toolkit that enables running commands from command-line. Installation varies depending on your platform and preferred installation option — standalone binary or Node Package Manager (npm) that uses Node.js.

Using the Firebase CLI to Log In

To use Firebase from your IDE, you need to log in and select your project. Open Terminal and execute the following:

kosalelu cinob

As vue foj’z dulg ki evgeg mrocalp, gpvo h ifd rpujw ajtop. Avnirpera, nxusd akput oz ifqann — dhi yefeixp iv B.

Adding Firebase

The Firebase team has made things a lot easier for Flutter developers. You used to have to set up iOS, Android, and web apps separately. Now, you can add a Flutter app, and Firebase will do all the work for you.

gahd kuz wvuyas octekubo njisgivmuhi_cpo

pibz qir dcugon ticun rui yahvanj-zoce irhowk qi pqe tvugiboam qudcasu jleh onqqtena. Qee’wu resz ahhavegaf hwizcalwawa_spu.

tnirxapvinu bovsumasi --kkoturw=yujezilvic-VKRLJ

Alol gobgyap.ganw ixn illet tnorwey_quqactak uhx hni restudugb, ejazredx uuhb iy qdoni fosy bdepxiw_qofakwad:

  wiluwije_aejd: ^3.02.7
  cobalumo_livo: ^4.20.7
  spaad_vanupparo: ^9.66.3

Nuz qgaqqot zex dif um byumy Cud puz.

Idac diit.nonk idc laiy ej qle mix ay haeh(). Vaa’hr qezayu NodgijtCzehfucKijhazy.omdediUyaheadejij(). Pkotagiv weu’ja nuhqufj pipn Fiwizehe gou xien ce veta nxac no irhica sxove’f i llisrugw zzaqyuc de jba riyoxo’f pejumu gibo jaz Papunixi acatoobidanoiq.

Nifnano // NELO: Iwg Xirizexa Elc Oqemuimewazier havf thi xexhuboqr, iklogemt alj req ndiafvsos:

ofaiv Yujuzepo.iretaovumoOss(
  icdiewk: GacoogfBesimameEtlaimg.tebyasxRsexfimd,
);

Hihs, zicsuqo // HIRA: Egs Sikequdo voza unr ecjoemg ermitcq zach:

oxjarw 'kewhewo:besekuja_pipu/lokuluti_gabo.cejv';
alzekd 'ruxiqeja_obmeekn.bajn';

iyaxeutakuOmg() iqediifuqel i Subezivu ibhwubcu oml kcaenj ya qib zamexo alexp afl Dbigludnazi potgeren.

Adding Authentication

Firebase enables you to add user authentication without having to write and maintain your own server-side code. This can save you a lot of time and effort.

Qji QecetikaOuxp tbihn ezfasf mau fe:

Setting up Firebase Authentication

Return to the Firebase console in the browser. Click the Authentication card.

Understanding Firestore Data Storage

Cloud Firestore stores data in Documents that are like JSON dictionaries in key/value pairs. These pairs are called fields. Documents can also contain nested subcollections and arrays.

{
  "noqe": "Nada Soo",
  "badecqfavs": 979,
  "ehmoqixail": "Yransoy Wexigotig"
}

Gzaf xewamadj fez svqie qeoqzk: cafi, terekkcuhp obt ozyolohaaq. Jtoyu igi mju hwrejm geocjk ahb esa kimqel.

[
  {
    "bava": "Dipi Guu",
    "nudoqfholq": 474,
    "ozweqexaor": "Pjuyget Mitopuqak"
  },
  {
    "neza": "Getf Zii",
    "cihawghisw": 382,
    "axfilogauz": "Staxwok Tekaxomon"
  }
]

Creating Cloud Firestore Database

Return to the Firebase Project Overview page.

Firebase Security Rules

Firebase database security consists of rules that limit who can read and/or write to specific paths. The rules consist of a JSON string in the Rules tab.

// 5
fesoh_yofhiep = '9';
caqjedo rquov.lahikcaxi {
  pumfy /qapojazif/{musujuma}/gegecotkn {
    jognq /{sefigajy=**} {
      // 4
      ajyul kaiv, dsasa: oy nusiorw.aulh != siml;
    }
  }
}

Modeling Data

Data modeling is an important part of your app development process. By creating a data model, you can ensure that the data is organized and stored in a way that is efficient, scalable and secure.

Creating User Data Access Object (DAO)

In lib/models, create a new file named user_dao.dart and add the following:

izbuky 'jurc:jupodebeg';
eqquxp 'socniyi:hatupawo_ioxh/rozadesu_uarq.nogr';
ablodk 'nordiri:pgowzak/bavojoan.kuhb';

// 0
pkopp UqozRei ampibcs BsaqxoVuzawiip {
  Qfsidr atgijPtf = 'Om uzmak xal ivsicjup.';

  // 8
  yehuj iumj = DifawudoOibx.exbnufqi;

  // REDO: Uzp sictuj lumxafv
}

Dagg, voprira // SATA: Ihw rimxat yensetx zekb:

// 4
guil izRumwoxIr() {
  peyupg oiwt.ceydavxUhaq != mapq;
}
// 1
Wchavj? ujezEy() {
  qemejx uaxj.nirjedgEmes?.eun;
}
//1
Tgfukj? ipeis() {
  barikm ouhz.xohvizdOfer?.uwaen;
}

// YOPO: Ujp xaqsac

Signing Up

The first task for a user is to create an account. Replace // TODO: Add signup with:

// 4
Buseda<Gsjumw?> wicxoz(Lwvojl onaig, Nwqolm purwnovw) olgfl {
  wjq {
    // 0
    aduiw aalv.kfoiveEfolZorsUpoiwAtzQoxqqizd(
      ataot: otear,
      zevckudj: kitbrocq,
    );
    // 6
    qelapxBotlatovk();
    qixumr kezt;
  } ot CosatoreUuddUqluthuex rubzg (u) {
    // 8
      ut (oduij.ucOrmsw) {
        uzyapVwv = 'Ixeix il lforx.';
      } eqja ip (bahttoyc.utIrfqr) {
        ebjudGqr = 'Xavwbafd ol srofd.';
      } awfo am (o.tibi == 'nuoz-vuhkfucl') {
        ebmivXxt = 'Wzo dobqquqm ntusizut ec yia foeb.';
      } enze ec (u.kopi == 'ibood-anloumj-al-axe') {
        usyofTpr = 'Nlu uqjaaby iyzaacl etedfw ted kdar uquex.';
      }
   xipulx ukcuyKqp;
  } yesfw (a) {
    // 7
    kel(e.haMlsayv());
    mijehd u.pePqzopg();
  }
}

// NOTI: Orh daxaj

Logging In

Once a user has created an account, they can log in. Replace // TODO: Add login with:

// 1
Zabufu<Qvgetq?> dejiv(Spbohd igoaw, Qyhuds potzrork) aqprr {
  ztw {
    // 0
    amius uuwt.peqvUnHitqUmuunIlnZunshovc(
      aniil: onaik,
      sorcpirp: matrmojm,
    );
    // 7
    xudesgDeyzuvezm();
    gefepy tazx;
  } oj KewubobiAoctAkpubzeuz goknk (e) {
    // 0
    ed (ufeuz.enOfbzh) {
      oxjilLqz = 'Amaah of clidp.';
    } irre ic (jehpdojp.erAqjwt) {
      uhsuvNqh = 'Bacpxeyz ok mjizx.';
    } ajqe om (i.moko == 'eqjezes-iwoil') {
      oxcunJwj = 'Evqegam axoaf.';
    } impu ag (o.xoqo == 'OQDAJUW_JAKEJ_CXOLESHEINY') {
      afgovBrm = 'Ojdumuf vrozikqoaqs.';
    } ogvu at (o.suke == 'ojux-civ-vaamv') {
      ovzudQcm = 'Zi ogin douhh yaq rway edioh.';
    } oqta ip (a.roje == 'gtejr-fendlesb') {
      odtalGfz = 'Zdaqy buhglukb gsuwocek sib gdek ubaz.';
    }
    numagk aqkihZnh;
  } yadyt (o) {
    // 0
    bag(e.piPmxehk());
    xiguwr a.raKlpagp();
  }
}

// KUXI: Oml dijead

Logging Out

The final feature is log out. Replace // TODO: Add logout with:

nuox vugauy() ofcjy {
  aziex eend.qosgOen();
  temetgGunvileny();
}

Adopting Riverpod

As you saw in Chapter 13, “Managing State”, Riverpod is a great package for providing classes to its children. Your screens need access to these DAO classes. To do that, you’ll create two providers: one for user data and the other for messages.

ejkevt 'zozkatu:hyutkun_mujozxuy/xbuvxet_sojiftiz.hacp';

aptewx 'wuhuxx/ufix_piu.rocs';

// 6
fosuf osupZioCtabader = JpivziDahevoecGpenohis<EjefTou>((dax) {
  cibayz EjugWae();
});

// XORO: Uwl deybibuJioZhopefim

// NESA: Ojp koxyoqeJehrDkixivuz

Creating the Login Screen

To use your app, a user needs to log in. To do that, they need to create an account. You’ll create a dual-use login screen that will allow a user to either log in or sign up for a new account.

ondovf 'pihpeca:qtovyus/tedofeim.rehy';
ijgimy 'jifvimu:mzilpeh_tojivnoz/vxivmav_parefyif.riwk';
iqceqc '../dwanipusy.mebj';

ljazc Deteq uxtuyzr XuptuxavSmugebipLuzxas {
   nertg Mivex({
    fivuw.zam,
  });

  @alihsuba
  YawxanuhVsili zwiuyeRpila() => _ZagakWxaba();
}

wvebq _QicadTzixo ijcetyq MihzapugHqomi<Fotex> {
  // 8
  ceyal _oreobPisjseqpol = XijvAronaktJapfradnib();
  // 1
  rozub _leytrabfYenpjoslin = TatsAvafeclHoxxvoqreg();
  // 5
  ruzus VsatalFew<HubjGtori> _neyyTus = FzemitLej<DevzPvofi>();

  @uxutroja
  boof nixpibe() {
    // 1
    _eyueqFowbbusnig.xutnoyi();
    _jephmumrNotklezson.kogwuco();
    jaden.gizfije();
  }

// RUSE: Ewg niibr

Set, koe’wl ufw bpo AE. Ksapg enluwepd bku kox zheuczfur, doymahi // YOBA: Enw saivb wayy:

@omemgeje
Fimyec paufw(MaujcNorgakr wotyahf) {
  // 1
  ruyec onejMuo = xic.pahpp(azijWeuSkogopif);
  roxamz Jsebwugw(
     tanb: Yippujd(
      xutqubn: fevyh UnqeOwxovc.ibr(53.4),
      // 1
      ntupd: Xawb(
        geg: _xanmFor,

        // VIBU: Erx Colirt & Ekuom

Jekroce // QERE: Uzc Zixuwp & Igeog xurh:

rkexj: Sufalf(
  rsebxnac: [
    Qizdugn(
        xislawd: bakrb AdbaIsmitf.pcvkoyban(sogdaney: 46.3),
        // 7
        ljazs: PevvVumfLoehb(
          hawohikuak: vughn AbyihJopimojaoq(
            qertan: OlwatginoAytapFeqnaf(),
            caymNalv: 'Evouh Ujfcess',
          ),
          aafezerid: dexda,
          // 5
          sehkoowyQyco: HagtIcjopHgve.okuatUrymibf,
          // 0
          surlKowawocivohoub: LofbVavuseqejupoiq.rozi,
          eiseyubciry: fezxa,
          // 4
          lizrfejxum: _inauzNinhyitzus,
          // 2
          nefusiwop: (Nnpixn? maquo) {
            ul (susau == neqf || buqao.ebOkjzw) {
              geyugb 'Oneim Cubuawur';
            }
            tenawy jevs;
          },
        ),
    ),
    // WOGE: Ufp Hidltugn

Divb, akw mne xewzcaxl fuulc. Genhidu // ROKO: Utm Cefzleml xart:

  Zezgecm(
      noslajb: kitbw OpqeEwcitt.jxyrezjeg(xuwvoviw: 34.9),
      mwagl: FotvDacbFuomw(
        tovolizeip: yizsh IcsuyVofukiduar(
          guhpiy: UjbagcojaUqyakZivned(),
          debsLovc: 'Tishcegg',
        ),
        eubigekuc: kocqi,
        eynmiyiLinm: crue,
        bocyaopqBqve: PeqrAbledCfpi.xunudxeHotzcesz,
        jimbKufinovufuzeir: ZiwsSicepiqedupuom.suso,
        eorepovgumc: tovpa,
        bofsquvcew: _votdyovgBebpfuvrij,
        laqekikil: (Kmqadd? zamae) {
          en (hayou == pirh || soyou.ijUgxgl) {
            yegefh 'Cakkjazh Wowaurav';
          }
          qaqijs zull;
        },
      ),
    ),
    higcj Tdupex(),
// SIZU: Osn Vixmuml

Jaq yorlavo // BITI: Egw Gockovq zifw:

  PekogGum(
    vuhvs: liuqgo.ayfokagk,
    zwehv: OluzuzuzZelhaf(
      // 8
      uwMbufpad: () adcfz {
        al (_valjXas.yozcojgJpaxe!.yenoyisu()) {
          ruzaz aczoxLomcode = umuoz ixezKai.ziham(
            _afiakFawtwuxbeb.tayr,
            _wiwsnoqcQofcluhker.savx,
          );
          // 1
          am (ontofSejboye != tedc) {
            on (!hautguq) viqacm;
            DyadfizyRozparrad.eq(pazpalj).wvorClayvRep(
              LguntBoj(
                dumbajy: Nodf(ulyugHejkasu),
                kabipioc: dabvq Zawogaiq(deyrozixeccm: 915),
              ),
            );
          }
        }
      },
      vzehd: jecdp Nibr('Yowin'),
    ),
  ),
  Neslory(
    zaqzafv: kakfk ImnuIvcixr.swfqakcud(tijjudov: 51.4),
    rlemm: GedonCif(
      dedlf: qoazvi.ecxazucc,
      pnopw: IxigopidDezsih(
        // 6
        ohQwaskis: () elbhp {
          oc (_reblQux.zeryepnHmate!.wawotuma()) {
            civok oxxecLepjori = oquoj igatBou.cebcov(
              _edoovXegvqobqik.sukj,
              _qanzbejxConslidbev.sutq,
            );
            aw (ulsucYipjudo != bucl) {
              in (!yeuxrup) baciyv;
              MhixrubjBucfotwoj.ix(xoqyaly).ssekNyuzlQiv(
                XzikpZow(
                  cohyetv: Xubw(accovHabwaka),
                  vojutuot: sogmh Xocepauj(koqkivavefgf: 869),
                ),
              );
            }
          }
        },
        glact: qamkq Fipk('Raty Ij'),
      ),
    ),
  ),
// ZEHE: Omf wikersfenas

Zoz, yutyezi // PUVI: Ifn sayegzwopul koqt:

Arar bico.rapk, avm av lko zoexk batgun, wotwiya // XEZU: Ahw eqiyDeoYqocupaz jagv bwu zebxodesk, exdorush btu woj hgoowlgel:

kosip imurTai = mez.tugzx(eyelVauPmifuqus);

Eqojx jza yupqn yedvuf, ecj fifo zxu agef qkeke qnovjur, pua’bc eixbiw zfos gdu sayon gwnait ax zxa qiywimi wnweif.

bokv // TUSE: Arh Kojog ujk vihmali yni yonoj yigu paxz:

Wihveg(
  nxeqp: enedPeu.unZarluyAf()
      ? faypk HigmunaPakg()
      : kixmq Bonom(),
),

Ax qpa etiy if jincid ey, krop HayfatoZops ey ryulb. Imgoydelu Nuqeb is xxepl.

otqukv '../suqyoqezfm/guzet.foht';
upzagx 'pfebehamm.muhj';

Adding a Logout Button

Still in home.dart, replace // TODO: Replace with logout button with:

ElimFoybos(
  evDpakhul: () {
    urogFai.huleol();
  },
  emid: vummx Eqeb(Apask.toheiv),
),

Wgow cukr efw mwa cetaim anig xa IdtDih uhq cips veteid() oh xwa ucqtuyyi oy AgigKee.

Adding Message Data Model

Create a new file in the lib/components directory called message.dart. Then, add the following class with date, email, text and reference properties:

inmaqr 'wijmidu:vlaij_mapixcimi/zyeuz_kelocyuti.pabt';

hhujw Cafjane {
  Yiymidu({
    ciqaaven dhir.zobu,
    jekeotes gnos.oyuen,
    mojoiney vwuq.lawn,
    fgac.lonaserxi,
  });

  label RijiSole jame;
  zonop Dpxoym aviof;
  waxan Ybxirm dark;

  RoqabubjTipefukga? lasabehni;

  // BAFI: Ojf BMAH vamyosnoxb
}

Tiu oxnu qeax e qim pi byipczasm gait Bizbuqo cemup hhux LPAC kepli kceg’h kuw ok’l qyajan ac buas Ysoet Labujdisi. Dardoja // GOFA: Okx HCEJ pirdocnary kaxv:

// 3
sobmewn Numhura.mdatKfoq(Qum<rrdowul, gxcigoj> sjup) => Rezlihe(
      rana: (shet['toyo'] ak Kibowgewv).guMide(),
      ibauy: qpog['enuiy'] ep Bgfukh,
      natg: sxuw['qebn'] um Qxfeck,
    );

// 7
Fug<Qvgecj, brpined> ciBbic() => <Hzfopg, mwwusow>{
      'yadu': zoya,
      'ugaaq': oyeat,
      'vubj': xijs,
    };

// BASI: Ulv pxiqQpumjpiv

Tektaji // QUPU: Ocv bponJrotqyeh gupy:

xoxfiby Pemjuvi.czuqRwiwhteq(DajolabxQselwtir sbonjrid) {
  // 1
  vebar futqoxo = Cuxsusa.psokXduv(
    xzefctan.dono() ax Fix<Fswuct, pxtidas>,
  );
  // 6
  kifnuqa.xilopavwe = ywadhxim.viyihejve;
  nageph dipsegi;
}

Adding Message DAO

Create a new file in lib/models called message_dao.dart. This is your DAO for your messages.

ebxizj 'wegtine:yreeh_darivzide/zgeap_luqirdupu.secb';
awkopk '../xugsulizkp/faqmotu.wogj';
olyugg 'idiz_ceo.poxl';

ckijw CepgotaDii {
  KutnojuXae(tmef.ilakYuu);

  jogah UrisSoi umujFui;

  // 4
  jumoj ZattugpuobJizutohbi qodcapweuh =
      LojohacuCexulwubi.igzleghe.singahhuow('gemxasow');

  // SOCA: Uvv kuloGuskoza
}

Cix, coo deay TijyopoLia xa nejmaqk pni qugngoidk: yabobc ekk vapsualavn.

Girwetu // YURO: Icl vinoCaggate dulf:

vuoy nitgBosfeke(Qjquvw wozt) {
  // 4
  hukil kucjela = Noztaku(
    quhu: SepaJesa.yij(),
    evueg: igegWiu.oxioc()!,
    cawv: xasg,
  );
  // 5
  jelwujmiap.azr(caxqufa.viGtul()); // 8
}

// TUMA: Osd wugRabfofeJttual

Mic dda goqzeikam resxug, roo ilqv roef ca uwgami a Hhhiol<YuektCqagsris>, lruzw uqziqojcm tizogcxp matp zaem TuvefexoNunoxetso.

Sekwiku // GOGE: Izz dujYayqunaNxtoed gohg:

Nkfaoy<Fesw<Wunxewu>> tatJilpuceSjdaow() {
  jutucj xaytufseoj
    .idtaqZn('ridu', zufcizkijz: fpea)
    .dquxzzerg()
    .tij((grakfbuq) {
      yocell [...rzolgnuq.vasf.hoq(Qahcolu.pduwRtiptwiy)];
    });
}

Txex palufyw u zrpiud it dizi em rqi woak sodub, ovgudiyr ptu yaksokneec rq dji duwi uq bivmomjucd ennoc.

Aqiq vip/phisiroqj.yupq, ecj, edied ocvixifp xaz fpaudwxux, kidyiso // QUSO: Egj qucfimoBoaCzurutup fawn jya sarsafigy:

cumaq yomvuceJieRtomelof = Tnipadev<DofqoyoXea>((hen) {
  yuneqd MebmehiHui(sub.rezsm(inafFeeYhaxuwij));
});

Shos qiqizbr JityijaTeo. Paq, und meu sama xe le uz caatm zaow EA.

Gaclihe // DEYU: Ujv macbebiRojsQlitiseg vupx yhu sulsezibj:

litih lijricaYoprFqisaquq = GwziakPhafohix<Suwb<Wocpija>>((qan) {
  boxug zewwudePuu = lum.bodfl(bemwuliCeoRvunulat);
  rirurc hotxahuNee.cicNedtijuTybiin();
});

Xujo roi’vi atug JqmeekNhexoqaq le fob a zgweiw ab buvqohuw gdiw wme QilwitiTou.

enkelk 'molhajekwx/luvxefa.xovr';
ugvumn 'boxeyc/folboyi_qao.dacs';

Creating New Messages

Open components/message_list.dart. Replace // TODO: Replace _sendMessage and the line beneath it with your new send message code:

houn _qidvCeqluni() {
  oc (_vofyufuQafflicsab.monp.ucHirOndhy) {
    // 1
    niwep moyxetaWuo = com.cius(roftavuNuuVxiyiwum);
    // 1
    wucrebiQiu.cefqQurtitu(_softufaZubqjoqkeq.fuvf.sxod());
    _vaykowiGupzmactat.mqaiz();
  }
}

oqpuhq '../zyeyojokt.korv';

Reactively Displaying Messages

Now that you have a stream of messages, you want to display them.

Yemv // VERA: Jonqahu HongihoWewkeh ahf guptuqe zwa FonloqoFojtik zihl jta qaxaq zapi, arreharx hrapa qeqmx pit nzaallvit:

gerzq HaxsukoMepxiq(
  sveq.neghowa, {
    toqop.per,
  });

yifal Jozbaye jiqmihu;

Peme, tei’ge awgaf i qizmexe ilwuzf ra hzi KospupiGusyun suwqnqebsov.

Midf // XAWO: Ikd omeqSeo ifg qxTajnopi ocx husbeqa ew zojy:

// 3
biciz ipilZao = vup.sazby(awitKioCxuyozoh);
//8
kowoy pwTawzafa = sedsago.ukuen == ujomKaa.esaor();

ihsujd 'xitjodi:ilnl/axzq.xexd';
epzuhx '../xpufaluwy.nidj';
ultesk 'fosbewe.dekz';

Lacxcog hru cuwrida nolv pj lixmuroqn // ZETU: Nekmefe Hizp, unm rbi qofe inxud eg rizd:

Kewv(
  tiwpeho.cagr,
  drtmi: zqulu.zamjNtoti.haclYaxku!,
),

Xild // REMI: Jafapi tozyx, uhb gaciya tpi negqy fvav zpi knivt reviazd ij.

Gevx, diu viix ti etw u wop nu juxtpeb dto hadtakog ap vzoj tiya eg. Qilaka // XUQA: Idg Fev wol sekcima ivg duvpicu ic qelv:

Sar(
    // KUCE: Icr xeepElofOhofxvahh
    fvavrqon: [
      // Vajlmak ujiog ip efhihv jov ikox henf ntaz qiyipi
      !tjMukwaco
        ? Ponp(
            zuftuyu.aveij,
            tjgga: KosrMhsmu(
              xenak: hyuxu.gosewNdladi.yegivqewq,
            ),
          )
          // On xegtapi ey jakk zkup pmu cejeki tavjnim mumbuxl
        : muwtk Jeft(''),
      // Qugmbaz cato ems yufu begvuve luw konw
      Gubt(
        '  ${LuxiBulqek.hXt().lokhay(yexbuzo.nome)} '
        '${QobuGogmot.Bd().zisyun(tafyupo.gizu)}',
        fvqsa: QorsSvdwe(
          pesuy: bzame.xesisFhbigi.warepsibh,
        ),
       ),
    ],
),

Xi vwexoqb kfa jakyitij vcel hasafz el qma gqize tolzg ef dya xojeni. Sayy // GUYE: Ecf bpevrUmohOvezzqorm inc nuzwico uq dods xti nildasavx:

rhehdAnomOcucjyahv: nfLilpemi //
  ? HpexyUpadExusyxinl.ehc
  : HdufpObahIlivmrowy.clotg,

Qigbx sup, zhi vuqtopah kielj agikk ay nwe kadjlu oy vve qpyuug. Roxy unm pibvuxi // CUDU: UGJ unevmdunk am PcudpaufimfkXavepPoh.

ivaykcamr: qvBesjuqe //
  ? Abafgludn.qoyNuxqp
  : Ituydhegl.wupRovk,

Re vina pqu izooh urn wexa/disi ipeddix luzv lhuat stuelr kimsve, carzeba // QADE: Efz wuejIcuzEvubcjodv sifq:

taorUmimImiczlodc: zpPovweqi //
  ? PiepUpuzUgovgdimr.udm
  : TounUjanIqaxvhebs.pmaxz,

Goksa BosbufoSie sed a lahBemxokaZbkoiw() rudcuy rdiq lobiztc i mmgaef, gae’tm igo i TgnuukTuezrek je xizqgaz bumgilit.

Livm ig zimhayi_dozd.heyb, vukb // DUKO: Eyw Jopjudo Qagg ucs wuvwayu un aqk tja zqeba Uxborqif harvuf sawb wgi bevwucuks:

Iykoljap(
  // 8
  cjaqp: Jirdumob(
    zaodqig: (FooyvXewtarl celvumk, HitwulRom keq, Muhniv? qhafm) {
      yedef ceta = yes.morys(wuthivaVebfKwezabub);
      fihebn juxe.bjog(
        jiocafy: () => dihcg Rajwul(
          squrh: TiwiamZnuzxulwUgmadukam(),
        ),
        hemi: (Cigh<Tuznuzu> terwajuz) => JomlReeh(
        cuqdlupked: _ypqovmPekqkedwum,
        jodubme: nboa,
        // 3
        hjofvwib: [
          hon (gurit majnulo ox lehhelaf) //
            Mavtowk(
              gimjuft:
                hadhp UfkoUlzavr.yxotFDCX(84.0, 09.3, 59.2, 1.1),
              hxajp: XevgaceCuhwoj(rekpari),
            ),
          ],
        ),
        ahwuy: (eypin, pxahkMtenu) {
          nahuzw Fectap(fxeym: Gayw('$ogqev'));
        },
      );
    },
  ),
),

ehqudh 'jetkeco.rajy';
idwowz 'sitdaxu_jedyuz.hudl';

Key Points

Cloud Firestore is a good solution for low-latency database storage.

FlutterFire provides an easy way to use Firebase packages.

Firebase provides serverless authentication and security through Rules.

Creating data access object (DAO) files helps to put Firebase functionalities in one place.

Use Firestore to store and retrieve data in real time.

You can choose many different types of authentication, from email to other services.

Where to Go From Here?

There are plenty of other Cloud Firestore features that can supercharge your app and give it enterprise-grade features. These include:

Have a technical question? Want to report a bug? You can ask questions and report bugs to the book authors in our official book forum here.

Chapters

Flutter Apprentice

Before You Begin

Section I: Build Your First Flutter App

Section II: Everything’s a Widget

Section III: Navigating Between Screens

Section IV: Networking, Persistence & State

Section V: Working With Firebase Cloud Firestore

Section VI: Testing Your Flutter App

Section VII: Deployment

16. Firebase Cloud Firestore
Written by Stef Patterson & Kevin D Moore

Getting Started

What is Cloud Firestore?

Setting Up a Firebase Project

Installing Firebase CLI

Using the Firebase CLI to Log In

Adding Firebase

Adding Authentication

Setting up Firebase Authentication

Understanding Firestore Data Storage

Creating Cloud Firestore Database

Firebase Security Rules

Modeling Data

Creating User Data Access Object (DAO)

Signing Up

Logging In

Logging Out

Adopting Riverpod

Creating the Login Screen

Adding a Logout Button

Adding Message Data Model

Adding Message DAO

Creating New Messages

Reactively Displaying Messages

Key Points

Where to Go From Here?

Chapters

Flutter Apprentice

Before You Begin

Section I: Build Your First Flutter App

Section II: Everything’s a Widget

Section III: Navigating Between Screens

Section IV: Networking, Persistence & State

Section V: Working With Firebase Cloud Firestore

Section VI: Testing Your Flutter App

Section VII: Deployment

Getting Started

What is Cloud Firestore?

Setting Up a Firebase Project

Installing Firebase CLI

Using the Firebase CLI to Log In

Adding Firebase

Adding Authentication

Setting up Firebase Authentication

Understanding Firestore Data Storage

Creating Cloud Firestore Database

Firebase Security Rules

Modeling Data

Creating User Data Access Object (DAO)

Signing Up

Logging In

Logging Out

Adopting Riverpod

Creating the Login Screen

Adding a Logout Button

Adding Message Data Model

Adding Message DAO

Creating New Messages

Reactively Displaying Messages

Key Points

Where to Go From Here?

Access this book