Easier default/initial values

@erikras I really wish there was a simpler way of setting up initial values at the Field level in redux form. Currently, the only way to set initial values, by passing an initialValues prop into the reduxForm component, often seems overly verbose and complicated. I find myself duplicating logic and having hardcoded field names spread around multiple files instead of just setting the initial value at the <Field/> level.

I know that the <Field defaultValue={XXXX}/> was taken out to somewhat recently to “reduce confusion”, but is there actually any technical reason why default/initial values can’t be defined at the field level?

Thank you!

[tnrich]

@erikras @ooflorent I propose adding the ability to pass an initialValue prop to a given field that would do the same thing as the initialValues prop to the entire form, but for the single field. The <Field/>'s initialValue prop would take precedence over the form’s initialValues prop.

Unlike initialValues, the initialValue prop would only be “additive”. By that I mean it wouldn’t affect the initialValue of any other Fields within the same form.

In a similar, but slightly unrelated vein, I think that we should also add a similar concept of a validate prop at the field level, but I can open a new thread for that.

[rtymchyk]

The current setup is especially frustrating with a wizard. I would like to be able to set the initial values of a field on a certain step of a wizard, but doing this wipes all the data accumulated up till that step. So I am forced to use initialValues on the first step of the wizard, which doesn’t even work if I need that to depend on data from another step.