Why could not load data from Adapter into JSONStore?

Question

function getListPhoneNumbers() {

    var data = {listContacts:[{name:'Ho Cong Vi',number:'12345666'},{name:'hcv',number:'6543218'}]};

    WL.Logger.info('Data:'+JSON.stringify(data));
    return data;
}

function addListPhoneNumber(data) {

    WL.Logger.debug('Add Data to JSONStore: ' + data);
    return;
}

function updateListPhoneNumber(data) {

    WL.Logger.debug('Updata Data from JSONStore: ' + data);
    return;

}


function deleteListPhoneNumber(data) {


    WL.Logger.debug('Delete Data from JSONStore: ' + data);
    return;

}

This is my code in main.js:

$('#show-all-btn').on('click', showAllData);

var collectionName = 'Contacts',

collections = {};
collections[collectionName] = {
    searchFields: {
        name: 'string',
        number: 'string'
    },
    adapter: {
        name: 'listPhoneNumbers',
        add: 'addListPhoneNumber',
        replace: 'updateListPhoneNumber',
        remove: 'deleteListPhoneNumber',
        load: {
            procedure: 'getListPhoneNumbers',
            param: [],
            key: 'listContacts'
        }
    }
};

WL.JSONStore.init(collections)

    function showAllData() {

    $('#show-all-btn').on("click", function() {
        $('#info').show();
    });
    WL.JSONStore.get(collectionName).load().then(function(res) {
        alert('ok' + JSON.stringify(res));
    }).fail(function(errorObject) {
        alert(errorObject);
    });
}

This is the error:

[wl.jsonstore] {"src":"load","err":18,"msg":"FAILED_TO_LOAD_INITIAL_DATA_FROM_ADAPTER_INVALID_L‌​OAD_OBJ","col":"Contact","usr":"jsonstore","doc":{},"res":{}

Answer 1

The error message is saying the load object you passed is invalid. This is probably because you passed param instead of params. Notice the s at the end.

Also, this code:

WL.JSONStore.init(collections)

    function showAllData() {

    $('#show-all-btn').on("click", function() {
        $('#info').show();
    });
    WL.JSONStore.get(collectionName).load().then(function(res) {
        alert('ok' + JSON.stringify(res));
    }).fail(function(errorObject) {
        alert(errorObject);
    });
}

Looks wrong, maybe what you meant to write is something like this:

WL.JSONStore.init(collections).then(function () {

  WL.JSONStore.get(collectionName).count().then(function (numberOfDocsInCollection) {
    if(numberOfDocsInCollection < 1) {
      WL.JSONStore.get(collectionName).load().then(function(res) {
        //handle success
      })
    }
  })
});

I omitted handling failures for brevity. Note that the load will will duplicate items in the collection if those items already exist, hence the count to check if the collection is empty or not.