Typescript and converting Object to String

Question

I'm converting a Object in Typescript to a string to store into a database.

formData.survey_data = encodeURI(JSON.stringify(formData.survey_data));

The output works,in the browser but typescript insists I have an error.

Type 'string' is not assignable to type 'any[]'

What does that even mean?

I defined it as an array, that was my issue. I defined it as an array and tried to make it a string. — Caleb Prenger
– Caleb Prenger, Commented Oct 3, 2016 at 13:42

kemiller2002 · Accepted Answer · 2016-10-03 13:31:28Z

4

formData.survey_data = encodeURI(JSON.stringify(formData.survey_data));

Based on the code provided, I would assume that survey_data is type any[]. You are serializing your object and trying to assign it to that property. TypeScript is strongly typed and won't allow you to do that even though JavaScript may be able to handle that scenario. (Because JavaScript isn't strongly typed you can assign any object to any property).

answered Oct 3, 2016 at 13:31

kemiller2002

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4 Comments

Caleb Prenger Over a year ago

So do you mean because I assigned it to something else before hand, it throws an error because I try to reassign it?

kemiller2002 Over a year ago

Somewhere in the code formData.survey_data has a has a class/property definition which is specifies that it is of type any[]. If you want to change it you have to find that.

Caleb Prenger Over a year ago

Figured it out! I defined formData.survey_data as an array earlier and not a string. Thanks for your help!

kemiller2002 Over a year ago

glad i could help!

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