React Admin - Get current value in a form

I found a working solution :

import { connect } from 'react-redux';

const mapStateToProps = state => ({
    recordLiveValues: state.form['record-form'].values
});

export default connect(mapStateToProps)(MyForm);

When mapping the form state to my component's properties, I'm able to find my values using :

recordLiveValues.surface

It really depends on what you want to do with those values. If you want to hide/show/modify inputs based on the value of another input, the FormDataConsumer is the preferred method:

For example:

import { FormDataConsumer } from 'react-admin';

const OrderEdit = (props) => (
    <Edit {...props}>
        <SimpleForm>
            <SelectInput source="country" choices={countries} />
            <FormDataConsumer>
                {({ formData, ...rest }) =>
                     <SelectInput 
                         source="city"
                         choices={getCitiesFor(formData.country)}
                         {...rest}
                     />
                }
            </FormDataConsumer>
        </SimpleForm>
    </Edit>
); 

You can find more examples in the Input documentation. Take a look at the Linking Two Inputs and Hiding Inputs Based On Other Inputs.

However, if you want to use the form values in methods of your MyEditForm component, you should use the reduxForm selectors. This is safer as it will work even if we change the key where the reduxForm state is in our store.

import { connect } from 'react-redux';
import { getFormValues } from 'redux-form';

const mapStateToProps = state => ({
    recordLiveValues: getFormValues('record-form')(state)
});

export default connect(mapStateToProps)(MyForm);