Unable to retrieve Objects from JSON

Here is a JSON object I received:

[{"model": "pricing.cashflow", "pk": 1, "fields": {"value": 4.0, "date": "2016-09-09"}}, {"model": "pricing.cashflow", "pk": 2, "fields": {"value": 3.0, "date": "2016-09-01"}}, {"model": "pricing.cashflow", "pk": 3, "fields": {"value": 3.0, "date": "2016-09-01"}}, {"model": "pricing.cashflow", "pk": 4, "fields": {"value": 3.0, "date": "2016-09-01"}}, {"model": "pricing.cashflow", "pk": 5, "fields": {"value": 3.0, "date": "2016-09-01"}}, {"model": "pricing.cashflow", "pk": 6, "fields": {"value": 5.0, "date": "2016...

I am looking to extract the values of "value" and "date" from this JSON data. I attempted to achieve that using the following method (what would be the correct approach normally?) but encountered an issue..

$http.get("/getcashflow/")
      .success(function(data) {
            for(var cf in data){
                alert(cf.fields.value.data*);
            }
      });
    };
javascriptangularjsjson

Answer №1

Considering your objective, it is recommended to utilize the .forEach() loop instead of the for...in loop. When used on an array, for...in will provide you with the index of each element, which may not be beneficial unless you specifically need to reference back to the original array by using data[cf]. This approach would essentially negate the purpose of employing a for...in loop initially.

var data = [{"model": "pricing.cashflow", "pk": 1, "fields": {"value": 4.0, "date": "2016-09-09"}}, {"model": "pricing.cashflow", "pk": 2, "fields": {"value": 3.0, "date": "2016-09-01"}}, {"model": "pricing.cashflow", "pk": 3, "fields": {"value": 3.0, "date": "2016-09-01"}}, {"model": "pricing.cashflow", "pk": 4, "fields": {"value": 3.0, "date": "2016-09-01"}}, {"model": "pricing.cashflow", "pk": 5, "fields": {"value": 3.0, "date":...

data.forEach(function (cf) {
    console.log(cf.fields.value);
});

Answer №2

Here is a code snippet in pure JavaScript (ES6) :

var input = [
  {"model": "pricing.cashflow", "pk": 1, "fields": {"value": 4.0, "date": "2016-09-09"}},
  {"model": "pricing.cashflow", "pk": 2, "fields": {"value": 3.0, "date": "2016-09-01"}},
  {"model": "pricing.cashflow", "pk": 3, "fields": {"value": 3.0, "date": "2016-09-01"}},
  {"model": "pricing.cashflow", "pk": 4, "fields": {"value": 3.0, "date": "2016-09-01"}}
  ];
input.forEach(item => {console.log("value -> " + item.fields.value + " and date -> " + item.fields.date)}); 

// value -> 4 and date -> 2016-09-09
// value -> 3 and date -> 2016-09-01
// value -> 3 and date -> 2016-09-01
// value -> 3 and date -> 2016-09-01

Answer №3

When working with JavaScript, JSON can be deserialized as an object. To access specific members within this object, you can utilize the dot accessor. In your scenario, the desired value can be obtained using data[cf].fields.value.data

Keep in mind that the for in loop will provide keys of the object or array, not the actual values themselves. For instance, during the initial iteration of the loop, 'cf' is assigned zero rather than referencing the first object.

$http.get("/retrievecashflow/")
      .success(function(data) {
            for(var cf in data){
                alert(data[cf].fields.value.data);
            }
      });
    };

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