# Dynamic mapping did not cast as the docs state
**URL:** https://discuss.elastic.co/t/dynamic-mapping-did-not-cast-as-the-docs-state/117857
**Category:** Elasticsearch
**Created:** [January 31, 2018, 4:55pm UTC](https://discuss.elastic.co/t/dynamic-mapping-did-not-cast-as-the-docs-state/117857 "2018-01-31T16:55:22Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@IanRC72](https://discuss.elastic.co/u/IanRC72)
#### Post date: [January 31, 2018, 4:55pm UTC](https://discuss.elastic.co/t/dynamic-mapping-did-not-cast-as-the-docs-state/117857/1 "2018-01-31T16:55:23Z")
I ran the following sample from [this page](https://www.elastic.co/guide/en/elasticsearch/reference/current/dynamic-templates.html):
```
PUT my_index
{
"mappings": {
"my_type": {
"dynamic_templates": [
{
"longs_as_strings": {
"match_mapping_type": "string",
"match": "long_*",
"unmatch": "*_text",
"mapping": {
"type": "long"
}
}
}
]
}
}
}
PUT my_index/my_type/1
{
"long_num": "5",
"long_text": "foo"
}
```
The result:
```
GET my_index/_search
...
{
"_index": "my_index",
"_type": "my_type",
"_id": "1",
"_score": 1,
"_source": {
"long_num": "5",
"long_text": "foo"
}
}
```
I was expecting long\_num to be of type long not string.
Am I missing something here?
---
### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [February 2, 2018, 12:41am UTC](https://discuss.elastic.co/t/dynamic-mapping-did-not-cast-as-the-docs-state/117857/2 "2018-02-02T00:41:07Z")
What does the mapping look like? That is, what does `GET my_index/_mapping` show.
---
### Author:  [@IanRC72](https://discuss.elastic.co/u/IanRC72)
#### Post date: [February 2, 2018, 4:59pm UTC](https://discuss.elastic.co/t/dynamic-mapping-did-not-cast-as-the-docs-state/117857/3 "2018-02-02T16:59:57Z")
> [@warkolm](#):
>
> GET my\_index/\_mapping
```
{
"my_index": {
"mappings": {
"my_type": {
"dynamic_templates": [
{
"longs_as_strings": {
"match": "long_*",
"unmatch": "*_text",
"match_mapping_type": "string",
"mapping": {
"type": "long"
}
}
}
],
"properties": {
"long_num": {
"type": "long"
},
"long_text": {
"type": "text",
"fields": {
"keyword": {
"type": "keyword",
"ignore_above": 256
}
}
}
}
}
}
}
}
```
---
### Author:  [@warkolm](https://discuss.elastic.co/u/warkolm)
#### Post date: [February 2, 2018, 8:53pm UTC](https://discuss.elastic.co/t/dynamic-mapping-did-not-cast-as-the-docs-state/117857/4 "2018-02-02T20:53:04Z")
> [@IanRC72](#):
>
> I was expecting long\_num to be of type long not string.
> [@IanRC72](#):
>
> "long\_num": {
> "type": "long"
> }
That seems to match?
---
### Author:  [@IanRC72](https://discuss.elastic.co/u/IanRC72)
#### Post date: [February 3, 2018, 8:14am UTC](https://discuss.elastic.co/t/dynamic-mapping-did-not-cast-as-the-docs-state/117857/5 "2018-02-03T08:14:43Z")
Yes, but the output doesn't:
```
"_source": {
"long_num": "5",
"long_text": "foo"
}
```
Somehow it's mapped as a long but displayed (stored?) as a string. That doesn't make sense.
---
### Author:  [@dadoonet](https://discuss.elastic.co/u/dadoonet)
#### Post date: [February 3, 2018, 9:21am UTC](https://discuss.elastic.co/t/dynamic-mapping-did-not-cast-as-the-docs-state/117857/6 "2018-02-03T09:21:54Z")
Elasticsearch never transforms the source document.
For example when you index a date "2018-02-03" it is indexed internally as a number but when you get back the source, it won't be a number but the exact string you sent.
---
### Author:  [@IanRC72](https://discuss.elastic.co/u/IanRC72)
#### Post date: [February 3, 2018, 9:26am UTC](https://discuss.elastic.co/t/dynamic-mapping-did-not-cast-as-the-docs-state/117857/7 "2018-02-03T09:26:58Z")
Ah, that makes sense. Thanks much for explaining this.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [March 3, 2018, 9:27am UTC](https://discuss.elastic.co/t/dynamic-mapping-did-not-cast-as-the-docs-state/117857/8 "2018-03-03T09:27:04Z")
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