# Extract repeated fields, where number of fields varies

**URL:** <https://discuss.elastic.co/t/extract-repeated-fields-where-number-of-fields-varies/131127>\
**Category:** Logstash\
**Created:** [May 9, 2018, 8:23am UTC](https://discuss.elastic.co/t/extract-repeated-fields-where-number-of-fields-varies/131127 "2018-05-09T08:23:01Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![vchandrashekar](https://avatars.discourse-cdn.com/v4/letter/v/f07891/32.png) [@vchandrashekar](https://discuss.elastic.co/u/vchandrashekar)\
**Post date:** [May 9, 2018, 8:23am UTC](https://discuss.elastic.co/t/extract-repeated-fields-where-number-of-fields-varies/131127/1 "2018-05-09T08:23:01Z")

</div>

Hi All,

I have a html log that gets generated from some of our servers.

This is similar to below provided snippet. The key:value pairs for each operationName is

## 

```

```

# operationName1

## key1

```
key1 related data here
```

## key2

```
key2 related data here
```

## key3

```
key3 related data here
```

## key4

```
key4 related data here
```

# operationName2

## key1

```
key1 related data here
```

## key2

```
key2 related data here
```

## key3

```
key3 related data here
```

# operationName3

## key1

```
key1 related data here
```

## key2

```
key2 related data here
```

## key3

```
key3 related data here
```

## key4

```
key4 related data here
```

## key5

```
key5 related data here
```

## key6

```
key6 related data here
```

# operationName4

## key1

```
key1 related data here
```

## key2

```
key2 related data here
```

## key3

```
key3 related data here
```

## key4

```
key4 related data here
```

## key5

```
key5 related data here
```

## key6

```
key6 related data here
```

## key7

```
key7 related data here
```

## key8

```
key8 related data here
```

As we can see, number of keys are not fixed and varies for each operationName.

I am not sure as to which filter can be used to extract all values for a particular operationName.

I was expecting some thing similar to below:

{  
"operationName1": [{ "key1": "key1value"},{ "key2":"key2value"},{"key3":"key3value"},{"key4":"key4value"}],  
"operationName2": [{ "key1": "key1value"},{ "key2":"key2value"},{"key3":"key3value"}]  
}

Please provide pointers.

Thanks  
V.Chandrashekar

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [June 6, 2018, 8:23am UTC](https://discuss.elastic.co/t/extract-repeated-fields-where-number-of-fields-varies/131127/2 "2018-06-06T08:23:07Z")

</div>

Closed on June 6, 2018, 8:23am UTC

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