redux-form version: v6.2.0
I have a credit card info form. (number, expiry, cvc). I don't have enough space for an error on each field, so I want just 1 form-level error field instead of many field-level input field errors.
This would be easy enough to do with form-level validation (adding an _error: firstFieldLevelError) but I don't want to show it unless that field has been touched (and of course touched is only available to the field).
So, I resorted to grabbing it manually out of the state:
const mapStateToProps = (state, props) => {
const formState = state.form[props.form];
if (formState) {
const {syncErrors} = formState;
if (syncErrors) {
const firstErrorField = Object.keys(syncErrors)[0];
const {touched} = formState.fields[firstErrorField] || {};
if (touched) {
return {
syncFormError: syncErrors[firstErrorField]
}
}
}
}
return {};
};
Pretty darn verbose for what I imagine to be something pretty common. Is there a better way?
Related
I'm having some trouble migrating one thing from the old addon-knobs to the new controls. Let me explain, maybe it's not such difficult task but I'm blocked at the moment.
I'm using StencilJS to generate Web Components and I have a custom select component that accepts a options prop, this is an array of objects (the options of the select)
So, the story for this component in the previous version of Storybook looks something like this:
export const SelectWithArray = () => {
const selectElement = document.createElement('my-select');
selectElement.name = name;
selectElement.options = object('Options', options);
selectElement.disabled = boolean('Disabled', false);
selectElement.label = text('Label', 'Label');
return selectElement;
};
This works fine, the select component receives the options property correctly as an array of objects.
Now, migrating this to the new Storybook version without addon-knobs, the story is looking like this:
const TemplateWithArray: Story<ISelect> = (args) => {
return `
<my-select
label="${args.label}"
disabled="${args.disabled}"
options="${args.options}"
>
</my-select>
`;
};
export const SelectWithArray: Story<ISelect> = TemplateWithArray.bind({});
SelectWithArray.argTypes = {
options: {
name: 'Options',
control: { type: 'object' },
}
}
SelectWithArray.args = {
options: [
{ text: 'Option 1', value: 1 },
]
}
And with this new method, the component is not able to receive the property as expected.
I believe the problem is that now, the arguments is being set directly on the HTML (which would only be accepting strings) and before it was being set on the JS part, so you could set attributes other than strings.
Is there a way to achieve this? without having to send the arguments as a string.
Thanks a lot!!
One way I've discovered so far is to bind the object after the canvas has loaded via the .play function;
codeFullArgs.play = async () => {
const component = document.getElementsByTagName('your-components-tag')[0];
component.jobData = FullArgs.args.jobData;
}
I am getting my head around Vee-Validate next (v4) and how I might incorporate it in a Vue 3 project without loosing Vue's reactivity (i.e. not relying on the values simply being passed to the Form submit event).
By way of example, if I were making a hypothetical component which has autocomplete functionality, and sent a get request to the server once 3 letters had been typed, but for the input itself to be valid it required 8 letters, how would I get the value associated with the input?
using plain Vue, with pseudo-code something like:
defineComponent({
setup () {
const myVal = ref('')
const options = ref([])
watchEffect(() => if (myVal.value.length > 3) {
axios.get(...).then(serverVals => options.value = serverVals))
})
return { myVal, options }
how would I achieve this with vee-validate 4.x?
defineComponent({
setup () {
const schema = yup.object({ myVal: yup.string().required().min(8) })
// ???? what now to watch myVal
please note this is not about autocomplete - a range slider where I wanted a server call when the value was greater than 10 but a validation message if greater than 90 would also suffice as an example.
You could employ useField here to get a reactive value that's automatically watched.
const { value: myVal, errorMessage } = useField('myVal', undefined, {
initialValue: ''
});
const options = ref([])
watchEffect(() => if (myVal.value.length > 3) {
axios.get(...).then(serverVals => options.value = serverVals))
})
return { myVal, options }
Documentation has an example of using useField:
https://vee-validate.logaretm.com/v4/guide/composition-api#usefield()
Note that you don't have to use useForm, if you are using <Form> component and passing schema to it then that should work just fine.
Do you know how can I get the ordered list of field names from given form? Instance API has a property called "fieldList" and it's an array but it's not in correct order. (ordered list = [firstFieldName, secondFieldName, ...] so what I need is a list of field names in order they appear in my form - top to bottom)
Also the redux-form' action '##redux-form/REGISTER_FIELD' is dispatching out of correct form order so I guess it's not what I need here...
(My redux-form version: 7.3.0)
I have experience with redux-form and also have checked its API, but didn't find a documented way for getting the fields in the way they appear in the form.
However, here's how I would do it:
I'll create a Reducer, that will keep track of the fields in the order,
they are registered (appear in the form).
We have very detailed action. As you already mentioned - ##redux-form/REGISTER_FIELD action is dispatching out all the fields in process of being registered in the correct order. This action has the following payload:
{
type: '##redux-form/REGISTER_FIELD',
meta: {
form: 'user'
},
payload: {
name: 'firstName',
type: 'Field'
}
}
Create a reducer. So I'll just create a Reducer, that will listen for all ##redux-form/REGISTER_FIELD actions. Something like that:
// The reducer will keep track of all fields in the order they are registered by a form.
// For example: `user` form has two registered fields `firstName, lastName`:
// { user: ['firstName', 'lastName'] }
const formEnhancedReducer = (state = {}, action) {
switch (action.type) {
case '##redux-form/REGISTER_FIELD':
const form = action.meta.form
const field = action.payload.name
return { ...state, [form]: [...state[form], field] }
default:
return state
}
}
Usage. In order to get ordered fields by a form, you just have access the Store (state) formEnhancer property with the form name: state.formEnhanced.user.
Keep in mind that you have to consider some cases as ##redux-form/DESTROY, but I think it's a pretty straightforward implementation.
I would prefer to keep things simple and just subscribed to ##redux-form/REGISTER_FIELD and just change the reducer implementation a little bit, in order to prevent form fields duplication. So I will just validate if the form field is already registered and won't care for supporting ##redux-form/DESTROY.
Hope it helps.
One way that I have been able to retrieve an ordered list of form field names from a given form is via the registered fields stored in the redux form state using the connect HOC (Higher Order Component) from 'react-redux':
import React, { Component } from 'react';
import { connect } from 'react-redux';
import _ from 'lodash';
class Foo extends Component {
render() {
const {
registeredFields,
} = this.props;
...
...
...
}
}
const mapStateToProps = (state, props) => {
// retrieve the registered fields from the form that is stored in redux state; using lodash 'get' function
const registeredFields = _.get(state, 'form.nameOfYourForm.registeredFields');
// creating an object with the field name as the key and the position as the value
const registeredFieldPositions = _.chain(registeredFields).keys().reduce((registeredFieldPositions, key, index) => {
registeredFieldPositions[key] = index;
return registeredFieldPositions;
}, {}).value();
return({
registeredFieldPositions,
});
};
// registeredFieldPositions will now be passed as a prop to Foo
export default connect(mapStateToProps)(Foo);
Currently my code works, but only for the forms specified specifically in the combine reducer function. But, I would like to have my code work generally for all forms loaded in my single page app.
Here is the relevant code:
import { reducer as formReducer } from 'redux-form';
export default combineReducers({
someReducer,
anotherReducer,
form: formReducer.plugin({
specificFormId: (state, action) => { // <-- I don't want this only for specificFormId, I want this to happen for all my forms,
// or at least have a dynamic way of adding more forms
const {type, payload} = action;
switch(type) {
case 'RESET_LINK_TYPE_FIELDS': {
return {
...state,
registeredFields: {
...state.registeredFields,
// Do some custom restting here based on payload
}
};
}
default:
return state;
}
}
})
});
So, anytime my <Field ..of a certain type/> fires off this the RESET_LINK_TYPE_FIELDS action, I want the correct form to respond to it.
In the action payload, I can specifically the form identifier or anything else I would need to make this work.
In fact, if the .plugin let me do my own form state slicing, I could easily do this, but because it forces me to pass an object, with a hardcoded form identifier it doesn't work.
Is there a way to have the plugin give me the WHOLE form state, and then I will slice as needed, and return state as needed based on payload?
There is currently no way to do this with the existing API.
You could jury rig a solution by wrapping the redux-form reducer in your own thing.
export default combineReducers({
someReducer,
anotherReducer,
form: resetHack(formReducer)
})
function resetHack(formReducer) {
return (state, action) => {
if(action.RESET_LINK_TYPE_FIELDS) {
// manipulate slice somehow
} else {
return formReducer(state, action)
}
}
}
Is it anyway possible to submit also the empty values on a form? If not how do you properly initialize the form from state?
If it is not possible do I really need to do aField: this.props.data.aField || '' for every field I want to initialize? This seems like a lot of typing and repeating especially on forms which have FormSections and nesting.
If it would be possible I could just do something in the lines of this.
handleInit() {
const { patient, initialize } = this.props;
initialize({
patient.aField,
// Other fields
});
}
Not sure if this is applicable to your scenario, but you can specify initial form values in the mapStateToProps phase:
const mapStateToProps = state => {
return {
initialValues: { ...state.patient } // Use this property to set your initial data
};
}
This is also explained here: http://redux-form.com/6.6.1/examples/initializeFromState/