Examples using my RealmWrapper.js and RealmSchema.js

RealmExamples.md

Examples for my RealmWrapper.js and RealmSchema.js

You can find the RealmWrapper here and RealmSchema here

//addRealmListener(fn)
this.realm.addRealmListener(this.updateImgs.bind(this));


//removeRealmListener(fn)
this.realm.removeRealmListener(this.updateImgs.bind(this));


//create(objectType, properties)  -- This just provides the native realm.create method for use, wrapped in a write
this.realm.create("SomeRealmObj", {prop1: true, prop2: 5})


//getOne(objectType, query) and write(transactions)
//Provided a fuller example for this one
let kv = {
  realmType: this.props.realmType, //SalesInfo in this case
  key: this.props.title,
  value: this.state.val
  kv.id = this.state.id
}
const queryString = {
  'SalesInfo' : `id == '${kv.id}' AND parentId == '${this.state.dev.survey.id}'`
}
let objectToUpdate = this.realm.getOne(kv.realmType, queryString[kv.realmType]);
this.realm.write(() => { objectToUpdate[kv.key] = String(kv.value) })


//delete(objectType, query) and updateProp(objectType, properties)
let lockedDev = {
  id: parseInt(dev.idnum),
  name: dev.name,
  county: dev.county,
  address: dev.address,
  latlng: dev.latlng
}
this.realm.delete('Assigned', `id == ${lockedDev.id}`);
this.realm.updateProp('Locked', lockedDev)


//updateList(objectType, objId, listName, realmListProps)
this.realm.updateList('Development', dev.idnum, 'images', { id: img.imgId, parentId: dev.idnum, data: img.data })


//deleteAll()
// Wipes the DB

//queryList(realmObj, query)
//I don't have a regular use case for using the Realm query result itself

//queryToArray(objectType, query)
// I use this method the most
let rows = this.realm.queryToArray('Assigned');
let rows2 = this.realm.queryToArray('Locked');


//listToArray(object, listName)
let realmSurvey = this.realm.getOne('Survey', `id == '${dev.survey.id}' AND parentId == '${dev.id}'`);
//Converting to JSON to pass to another server in this particular case
// Allows us to manipulate the data before sendoff, why we need a .toJSON method mentioned in the RealmWrapper
development.survey = JSON.parse(JSON.stringify(realmSurvey)); 
development.survey.salesinfo = this.realm.listToArray(realmSurvey, "salesinfo");


//======= Internal method examples (used soley in the RealmWrapper file) ====
//=========================================================================

//construct(objectType, properties)
// Used internally -- see updateList() in RealmWrapper
let newRealmObject = this.construct(objectType, {id: objId})


//deconstruct(objectType, query)
// Used internally in the RealmWrapper to access the Realm Objects children -- see query() below
let listChildren = this.deconstruct(objectType, query)


//query(objectType, query)
//  Used internally. This is actually copy paste of the delete(objectType, query) method
let listChildren = this.deconstruct(objectType, query)
let results = this.query(objectType, query);
 // this.realm in this case is the node module "realm" as this example is used in the wrapper.
 // Confusing I know
this.realm.write(() => {
    listChildren.forEach((child) => { this.realm.delete(child) })
    this.realm.delete(results);
})