In this blog we are going to see how to create Custom lookup in LWC.
1. Create CustomLookupControllerLWC apex class and copy paste below code
public with sharing class CustomLookupControllerLWC {
@AuraEnabled(cacheable=true)
public static List<SObject> searchRecords(String objName,
String fieldApiName, String searchVal){
try {
String key = '%' + searchVal + '%';
String query = 'SELECT Id,'+ fieldApiName + ' FROM '+
objName +' WHERE '+fieldApiName+' LIKE : key';
List<SObject> lstObject = Database.query(query);
return lstObject;
} catch (Exception e) {
throw new AuraHandledException(e.getMessage());
}
}
}
2. Create recordList LWC component and copy paste below code into html file.
<template>
<div class="slds-grid slds-wrap slds-dropdown_length-with-icon-7
slsd-dropdown_fluid slds-var-p-left_small">
<div class="slds-col slds-size_4-of-4">
<ul class="slds-listbox slds-listbox_vertical" role="presentation">
<li class="slds-listbox__item">
<div class="slds-media slds-listbox__option
slds-listbox__option_entity slds-listbox__option_has-meta"
role="option" onclick={handleSelect}>
<span class="slds-media__figure slds-listbox__option-icon">
<lightning-icon
icon-name={iconname}
size="small"
></lightning-icon>
</span>
<span class="slds-media__body"
style="padding-top: 9px;font-weight:600">
{record.Name}
</span>
</div>
</li>
</ul>
</div>
</div>
</template>
Copy paste below code into recordList .js file
import { LightningElement, api } from 'lwc';
export default class RecordList extends LightningElement {
@api record;
@api iconname;
handleSelect(){
console.log('this.record.id '+this.record.Id);
const selectedEvent = new CustomEvent(
'select',
{
detail : this.record.Id
}
);
this.dispatchEvent(selectedEvent);
}
}
3. Create searchCmp LWC component and copy paste below code into html file
<template>
<lightning-input
type="text"
variant="label-hidden"
onchange={handleChange}
value={searchValue}
></lightning-input>
</template>
Copy paste below code into searchCmp .js file
import { LightningElement, track } from 'lwc';
export default class SearchCmp extends LightningElement {
@track searchValue;
handleChange(event){
const val = event.target.value;
this.searchValue = val;
const searchEvt = new CustomEvent(
'searchevent',
{
detail : this.searchValue
}
);
console.log('before dispatchEvent');
this.dispatchEvent(searchEvt);
}
}
4. Create customLookup LWC component and copy paste below code into html file
<template>
<template if:false={selectedRec}>
<c-search-cmp onsearchevent={handleSearchHandle}></c-search-cmp>
</template>
<template if:false={selectedRec}>
<template if:true={records}>
<template for:each={records} for:item="rec">
<c-record-list key={rec.Id} record={rec} iconname={iconname}
onselect={handleSelect}></c-record-list>
</template>
</template>
</template>
<template if:true={selectedRec}>
{selectedRec.Name}
</template>
</template>
Copy paste below code into customLookup.js file
import { LightningElement, api, track } from 'lwc';
import searchRecords from '@salesforce/apex/CustomLookupControllerLWC.searchRecords'
export default class CustomLookup extends LightningElement {
@api objectApiName ;
@api fieldApiName;
@api iconname;
@track records;
@track errors;
@track selectedRec;
handleSearchHandle(event){
console.log('in handle event');
const searchValue = event.detail;
// Call apex method and create below Promise
searchRecords({
objName : this.objectApiName,
fieldApiName : this.fieldApiName,
searchVal : searchValue
})
.then(result => {
console.log('Records are ', result);
this.records = result;
this.errors = undefined;
})
.catch(error =>{
this.records = undefined;
this.errors = error;
})
}
handleSelect(event){
console.log('in handleSelect ');
const accId = event.detail;
console.log('accId '+accId);
const selectedRecord = this.records.find(
rec => rec.Id === accId
);
/*
above selectedRecord act like below
this.records.find(account => account.Id === accountId);
OR
for(account acc : records){
if(account.Id === accountId){
return acc;
}
}
*/
console.log('Selected record ', selectedRecord);
this.selectedRec = selectedRecord;
}
}
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