Validating data against a JSON object retrieved using fetch in react-native

Issue

I am trying to validate a string against values stored in a database to check whether that string exists there.

Here is the JSON Object being retrieved:

{
  "ArrayOfJobsModel": {
    "JobsModel": [
      {
        "LongName": "WC389 - This is WC389 Job",
        "Name": "WC389"
      },
      {
        "LongName": "WC256 - The WC256 JO Description",
        "Name": "WC256"
      },
      {
        "LongName": "TT134 - The TT134 description",
        "Name": "TT134"
      }
    ]
  }
}

Here I need to check whether a variable called jobNumber exists as a Name in the JSON object.

And here is the part of the code where I attempt to retrieve the JSON object but I am not sure how to search it.

fetch('http://orhapi.azurewebsites.net/api/services/LoadJobs?type=all', { 
  method: 'GET',
  header: {
      'Content-Type': 'application/json',
  },
}).then((response) => {
  response.json();
}).then((myJson) => {
 //not sure what to do here
}).catch((err)=>{
      alert('could not connect to server')
});

  if(this.state.numberExists){
  this.props.navigation.navigate('StockItem',{jobNumber: this.state.jobNumber});
       }
                             

I need to check whether jobNumber exists inside myJson as a Name (e.g check if jobNumber == WC256)

Edit:
Here is an attempt I tried but I can't figure out what's wrong with it:

then((responseJson) => {
                             responseJson.ArrayOfJobsModel.JobsModel.map((job, index)=>{
                               if(job.Name == this.state.jobNumber){
                                 this.state.numberExists;
                               }
                             }

Solution

You can use the map method to search a term in your array of objects.

for example -

 let itemFound = false;
 ArrayOfJobsModel.JobsModel.map((job, index) => {
    if(job.Name == 'Your search string'){
      itemFound = true;
    }
 });

Answered By - Alok Mali