How to make conditional get in Ionic Storage - get

Question

I'm developing Ionic2 App which is running on android phone.
It does not need remote db. so I decided to use local storage 'Store'.
I found some article and made some improvements like below.
I succeded to get all values but I want to get something on some condition like 'where' statement in SQL. (getWorksOn(someDate){...})
I searched and read more than 30 top articles but I couldn't find the way.
Please let me know if there's any way.
// work-service.ts
addWork(work){
this.storage.get('myWorks').then((data) => {
if(data != null){
data.push(work);
this.storage.set('myWorks', data);
} else {
let tempWorks = [];
tempWorks.push(work);
this.storage.set('myWorks', tempWorks);
}
});
}
getWorks(){
return this.storage.get('myWorks');
}
getWorksOn(someDate){
// I want to return works that worked on someDate
// Is there any way to get some value conditionally
return this.storage.get('myWorks');
}
// work-list.ts
works:any;
...
ngOnInit(){
this.workService.getWorks().then((data)=>{
this.works = data;
});
}

Answer 1

If you're using Lodash then you can do it as shown below.
Note: You cannot do this inside the local storage.You have to do something like this then...
getWorksOn(someDate){
this.storage.get('myWorks').then((val) => {
let myworkArray = val; //firstly, fetched the data
let myworkArray2= _.filter(myworkArray , { 'date': someDate});//after that filter out according to your condition
});
}
OP's Feedbackusing map and filter function of array
this.workService.getWorks().then((works) => { this.works = works.filter(work
=> work.dateStr === this.dateStr ); });