# I cant extract name using duckling in rasa 2.0

**URL:** <https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787>\
**Category:** Rasa Open Source\
**Created:** [November 8, 2020, 12:39pm UTC](https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787 "2020-11-08T12:39:34Z")\
**Posts on this page:** 20\
**Page:** 1

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**Author:** ![faiza\_conte](https://avatars.discourse-cdn.com/v4/letter/f/74df32/32.png) [@faiza\_conte](https://forum.rasa.com/u/faiza_conte)\
**Post date:** [November 8, 2020, 12:39pm UTC](https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787/1 "2020-11-08T12:39:35Z")

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I want to extract name using duckling but keep failing saing that "faild to extract requested slot 'name’s "…can anyone explain me

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**Author:** ![akelad](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.rasa.com/akelad/32/69_2.png) [@akelad](https://forum.rasa.com/u/akelad)\
**Post date:** [November 9, 2020, 9:54am UTC](https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787/2 "2020-11-09T09:54:02Z")

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@faiza_conte duckling doesn’t extract name entities. Can you show me the setup that you’re trying to achieve this with?

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**Author:** ![faiza\_conte](https://avatars.discourse-cdn.com/v4/letter/f/74df32/32.png) [@faiza\_conte](https://forum.rasa.com/u/faiza_conte)\
**Post date:** [November 9, 2020, 10:06am UTC](https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787/3 "2020-11-09T10:06:58Z")

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Ow thanks I didnt know that duckling can not extract name…but what about duration??

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<div class="post-metadata">

**Author:** ![akelad](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.rasa.com/akelad/32/69_2.png) [@akelad](https://forum.rasa.com/u/akelad)\
**Post date:** [November 9, 2020, 10:20am UTC](https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787/4 "2020-11-09T10:20:02Z")

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Please take a look at our documentation for this information: [Components](https://rasa.com/docs/rasa/components#ducklinghttpextractor)

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**Author:** ![faiza\_conte](https://avatars.discourse-cdn.com/v4/letter/f/74df32/32.png) [@faiza\_conte](https://forum.rasa.com/u/faiza_conte)\
**Post date:** [November 9, 2020, 10:42am UTC](https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787/5 "2020-11-09T10:42:45Z")

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I know I already say it…if I want to extract duration using duckling of course it will extract…but I see something else which is normalized value…and I want rasa to catch that so is that possible

 ![5dd75a4074404b140eae4abe6b80d6c5.0](https://europe1.discourse-cdn.com/flex013/uploads/rasa/original/2X/1/15a7ccd9c96b52c91d18d3a79cab82b2992b12d6.png)

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<div class="post-metadata">

**Author:** ![akelad](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.rasa.com/akelad/32/69_2.png) [@akelad](https://forum.rasa.com/u/akelad)\
**Post date:** [November 9, 2020, 11:08am UTC](https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787/6 "2020-11-09T11:08:34Z")

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the entity extraction has that information, if you want to fill your slot with anything other than the “value” defined there, then you will need to handle that in a custom action or a form (with a custom slot mapping).

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<div class="post-metadata">

**Author:** ![faiza\_conte](https://avatars.discourse-cdn.com/v4/letter/f/74df32/32.png) [@faiza\_conte](https://forum.rasa.com/u/faiza_conte)\
**Post date:** [November 9, 2020, 11:37am UTC](https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787/7 "2020-11-09T11:37:02Z")

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I did the slot thing…and it catches the value 2 as u can see from the picture …but if u see the picture there is a normalized one and I want to catch that if possible…did u get me ?

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**Author:** ![akelad](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.rasa.com/akelad/32/69_2.png) [@akelad](https://forum.rasa.com/u/akelad)\
**Post date:** [November 9, 2020, 12:03pm UTC](https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787/8 "2020-11-09T12:03:25Z")

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yes, you have to handle that in a custom action or a form, like i said. See this docs page for more detail: [Forms](https://rasa.com/docs/rasa/forms#custom-slot-mappings)

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**Author:** ![faiza\_conte](https://avatars.discourse-cdn.com/v4/letter/f/74df32/32.png) [@faiza\_conte](https://forum.rasa.com/u/faiza_conte)\
**Post date:** [November 9, 2020, 3:33pm UTC](https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787/9 "2020-11-09T15:33:38Z")

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I think u dont get me…the value is too…the formaction is taking the first value if you see in the picture…please see the picture again

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<div class="post-metadata">

**Author:** ![akelad](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.rasa.com/akelad/32/69_2.png) [@akelad](https://forum.rasa.com/u/akelad)\
**Post date:** [November 9, 2020, 3:53pm UTC](https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787/10 "2020-11-09T15:53:29Z")

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I understand the problem, the way to solve it is by defining these custom slot mappings that I linked to, instead of the default ones. the method to get that value from your custom slot mapping would be something like: `next(tracker.get_latest_entity_values("duration"), None)["entities"]["additional_info"]["normalized"]`

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<div class="post-metadata">

**Author:** ![faiza\_conte](https://avatars.discourse-cdn.com/v4/letter/f/74df32/32.png) [@faiza\_conte](https://forum.rasa.com/u/faiza_conte)\
**Post date:** [November 9, 2020, 4:02pm UTC](https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787/11 "2020-11-09T16:02:10Z")

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But slot mapping is depricated and is done in domain file so how will that works ?

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<div class="post-metadata">

**Author:** ![faiza\_conte](https://avatars.discourse-cdn.com/v4/letter/f/74df32/32.png) [@faiza\_conte](https://forum.rasa.com/u/faiza_conte)\
**Post date:** [November 9, 2020, 4:59pm UTC](https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787/12 "2020-11-09T16:59:28Z")

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So you mean getting the entity like this Duration=next(tracker.get\_latest\_entity\_values(“duration”), None)[“entities”][“additional\_info”][“normalized”] Like this…will I get the duration that is normalized???

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<div class="post-metadata">

**Author:** ![faiza\_conte](https://avatars.discourse-cdn.com/v4/letter/f/74df32/32.png) [@faiza\_conte](https://forum.rasa.com/u/faiza_conte)\
**Post date:** [November 10, 2020, 7:14am UTC](https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787/13 "2020-11-10T07:14:41Z")

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@akelad please am waiting for your answer

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<div class="post-metadata">

**Author:** ![akelad](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.rasa.com/akelad/32/69_2.png) [@akelad](https://forum.rasa.com/u/akelad)\
**Post date:** [November 10, 2020, 9:05am UTC](https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787/14 "2020-11-10T09:05:05Z")

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custom slot mappings aren’t deprecated, the default slot mappings can be defined in the domain, but you can define custom slot mappings as described in the [docs](https://rasa.com/docs/rasa/forms#custom-slot-mappings). So it would look something like this if you are using a form:

```auto
from typing import Dict, Text, List

from rasa_sdk import Tracker
from rasa_sdk.events import EventType
from rasa_sdk.executor import CollectingDispatcher
from rasa_sdk import Action
from rasa_sdk.events import SlotSet

class ValidateYourtForm(Action):
    def name(self) -> Text:
        return "validate_your_form"

    def run(
        self, dispatcher: CollectingDispatcher, tracker: Tracker, domain: Dict
    ) -> List[EventType]:
        duration_value = next(tracker.get_latest_entity_values(“duration”), None)[“entities”][“additional_info”][“normalized”] 

        return [SlotSet("duration", duration_value)]

```

If you are not using a form, then you would use similar code in a regular custom action.

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<div class="post-metadata">

**Author:** ![faiza\_conte](https://avatars.discourse-cdn.com/v4/letter/f/74df32/32.png) [@faiza\_conte](https://forum.rasa.com/u/faiza_conte)\
**Post date:** [November 10, 2020, 9:19am UTC](https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787/15 "2020-11-10T09:19:03Z")

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Okay any regular action that is going to be performed is also going to work thank you so much…I will try it and get back to you if it didnt work

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<div class="post-metadata">

**Author:** ![faiza\_conte](https://avatars.discourse-cdn.com/v4/letter/f/74df32/32.png) [@faiza\_conte](https://forum.rasa.com/u/faiza_conte)\
**Post date:** [November 10, 2020, 9:52am UTC](https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787/16 "2020-11-10T09:52:02Z")

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@akelad…here is the error I get while.trying to execute custom action for what u have told me

 ![Screenshot (276)](https://europe1.discourse-cdn.com/flex013/uploads/rasa/original/2X/d/d2498a572d313ce7ae11a3d9569ea68272f7da2f.png)

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<div class="post-metadata">

**Author:** ![akelad](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.rasa.com/akelad/32/69_2.png) [@akelad](https://forum.rasa.com/u/akelad)\
**Post date:** [November 10, 2020, 10:12am UTC](https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787/17 "2020-11-10T10:12:29Z")

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@faiza_conte at this point that’s an error with the object, it’s possible you may need to use a `.get()` for the entities, instead of `["entities"]`

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<div class="post-metadata">

**Author:** ![faiza\_conte](https://avatars.discourse-cdn.com/v4/letter/f/74df32/32.png) [@faiza\_conte](https://forum.rasa.com/u/faiza_conte)\
**Post date:** [November 10, 2020, 10:46am UTC](https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787/18 "2020-11-10T10:46:32Z")

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So @akelad how should I rewrite the code …

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<div class="post-metadata">

**Author:** ![faiza\_conte](https://avatars.discourse-cdn.com/v4/letter/f/74df32/32.png) [@faiza\_conte](https://forum.rasa.com/u/faiza_conte)\
**Post date:** [November 30, 2020, 6:34pm UTC](https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787/19 "2020-11-30T18:34:56Z")

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@akelad i did try but it says .get is nontype…i dont know how am suppose to write the .get one u said

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<div class="post-metadata">

**Author:** ![akelad](https://dub1.discourse-cdn.com/flex013/user_avatar/forum.rasa.com/akelad/32/69_2.png) [@akelad](https://forum.rasa.com/u/akelad)\
**Post date:** [December 4, 2020, 12:47pm UTC](https://forum.rasa.com/t/i-cant-extract-name-using-duckling-in-rasa-2-0/36787/20 "2020-12-04T12:47:42Z")

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@faiza_conte what code have you been using?

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