set default select item on FormBuilderSearchableDropdown [flutter_form_builder]

[You Sour]

hi , i'm using FormBuilderSearchableDropdown everything work perfectly , but i got a small problem on my Edit Form i want to set a default select item but i don't know how to set it . data list i get from my backend service look like this

Data :

[ {'label':'Apple', value: 00001}, {'label':'Book', value: 00002} ]

Backend Method

Edit from

can you show me how to set it ?
thank in advance :)

[Suzuki Tomohiro]

Can you share URL of the API documentation of FormBuilderSearchableDropdown?

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[You Sour]

sorry ,i don't understand , what you want :/

[Suzuki Tomohiro]

I want to see the document you were reading when you tried to use FormBuilderSearchableDropdown. Not a blog post but its official documentation.

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[You Sour]

in fact FormBuilderSearchableDropdown is a widget of flutter_form_builder package and it depend on 
dropdown_search 0.4.8  package so that is where i can see the document because in flutter_form_builder package i don't see any document how to use it     

[Suzuki Tomohiro]

Nice. DropdownSearch has selectedItem parameter. Does that work for you?

https://pub.dev/documentation/dropdown_search/latest/dropdown_search/DropdownSearch/selectedItem.html

You might need to figure out how FormBuilderSearchableDropdown touches the parameter.

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[You Sour]

i think it might work , but the problem i don't know how to set it , because when i insert data to database is value not label. label just show for user only , you can see my data example backend service  [ {'label':'Apple', value: 00001}, {'label':'Book', value: 00002} ]  

[Suzuki Tomohiro]

You must have the conversion from value to label. Use that conversion.

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[You Sour]

can you show me some example code or any doc ?

and here the work flow i want

 

[Suzuki Tomohiro]

No I don’t have any example or doc (I don’t use the widget)

What is the widget that you think should take a default value?  (and share the URL of the API document of the widget)

We know that DropdownSearch takes selectedItem parameter. Are you using other widgets?

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[You Sour]

you can see the workflow i post , on form update you will understand what i want  

[Suzuki Tomohiro]

I’m afraid that I still don’t know what widget you want to pass a default value.

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[You Sour]

FormBuilderSearchableDropdown widget

[Suzuki Tomohiro]

The document says all widget (including FormBuilderSearchableDropdown) has  initialValue property.

https://pub.dev/packages/flutter_form_builder

> In order to create an input field in the form, along with the label, and any applicable validation, there are several attributes that are supported by all types of inputs namely:

> ...

> initialValue

Does this set initial value?

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[You Sour]

it doesn't work :(

[Suzuki Tomohiro]

Do you think that’s because (a) the widget has a bug, or (b) your use case has a special requirement?

(a-or-b question)

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[You Sour]

B

[Suzuki Tomohiro]

1. Good. Would you be willing to explain why your use case is special? From the right of the diagram, it seems to me that your case is a common one where you get data from data from a server to populate the dropdown menu.

2. Would you try this experiment; without using data from the server, would you confirm that you can use the initialValue property of FormBuilderSearchableDropdown?

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[You Sour]

even though i get list data without using data from the serve , it can't  initialValue   

[Suzuki Tomohiro]

> even though i get list data without using data from the serve , it can't  initialValue   

Good. Then you just need to learn how to use initialValue of the FormBuilderSearchableDropdown. Would you run the example project to see how the widget works?

https://github.com/danvick/flutter_form_builder/blob/master/example/lib/sources/complete_form.dart

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[You Sour]

after a few days i stuck with this problem now it works, selectedItem isn't work for me but initialValue it works perfectly with FutureBuilder , thank you so much for your time  😄

[Suzuki Tomohiro]

You're welcome. Glad to hear it worked. In general, popular Flutter plugins have nice documents and examples. 

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