react-native-form0
v0.0.196
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Build model based simple forms for React Native
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react-native-form0
Build model based simple forms for React Native
Objective
- Generate Cross platform mobile form fields on react native
- Ability to track the state and values
- Load the form with predefined values
- Support nested forms and validations
Getting Started
- react-native-form0
- Objective
- Getting Started
Installation
npm i react-native-form0 --saveUsage
- Define the form schema as json
[
{
"type": "text",
"name": "user_name",
"required": true,
"label": "Username"
},
{
"type": "email",
"name": "email",
"required": true,
"label": "Email"
}
]
- Load the form schema in a react application
import React, { Component } from 'react';
import { Platform, StyleSheet, Text, View, ScrollView } from 'react-native';
import Form0 from "react-native-form0";
import { Button } from 'native-base';
export default class App extends Component {
render() {
const fields = require("./schema/form0.json");
return (
<ScrollView>
<Form0 fields={fields}
ref={(c) => {
this.formGenerator = c;
}} />
<View styles={styles.container}>
<Button onPress={() => console.log(this.formGenerator.getValues())}><Text>Submit</Text></Button>
<Button onPress={() => this.formGenerator.resetForm()}><Text>Clear Form</Text></Button>
</View>
</ScrollView>
);
}
}
const styles = StyleSheet.create({
container: {
flex: 1,
flexDirection: 'row',
backgroundColor: '#F5FCFF',
justifyContent: 'space-between'
}
});
Form Properties & Methods
Properties
| Prop | Type | Default | Description | |------|------|---------|-------------| |fields |array |required | Array of form fields | |errorComponent |React Component |N/A |Error display component | |formData |object |N/A |form values |
Methods
getValues
Fetch the data from the form.
{
"data_source" : "test",
"prospect_name" : "sharath"
}
setValues
Set the values of fields in the form. Ensure that the object setting the values has same name as form field name
{
"data_source" : "test",
"prospect_name" : "sharath"
}
resetForm
Reset the form, clears data and errors
setToDefault
Form Fields
Field is the basic unit of the form which generates an UI components. The basic structure of the field is
{
"type" : "text",
"name" : "",
"label": ""
...
}
Common Properties
The common properties for all the fields are :
| Prop | Type | Required | Description | |------|------|---------|-------------| |type | text, email, url, password, number, select, switch, date |Yes | Type of field | |name |string |Yes |Internal name of the field | |label |string |Yes |Display field lable | |required |boolean |No |Field is mandatory or not ? | |editable |boolean |No |Field is editable or not? | |hidden |boolean |No |Field is visible or not? | |defaultValue | |No |Sets the default value of the field |
Field Types
TextInput
Text input field allows to enter the text. The types of text fields allowed are, text, email, url, password, number, phone_number, currency
Type
{ type: text }
Additional Properties
| Prop | Type | Default | Description | |------|------|---------|-------------| |iconName |string |N/A | Sets the icon name from react-native-vector-icons | |iconOrientaion |string |left |Display icon to left or right | |props |Object |N/A |Additional properties for the text input |
Value Type
- String (text, email, url, password)
- Number (number,phone_number,currency)
Picker
Type
{ type: picker }
Additional Properties
| Prop | Type | Default | Required | Description | |------|------|---------|-------------|------------| |options |array |N/A | Yes | Defines the options | |props |object |N/A | Yes | react native picker props like {mode : 'dropdown'} |
Value Type
String
Default Value Type
String (The string value must be a valid options)
Switch
Implementation of react native switch component
Type
{ type: switch }
Value Type
Boolean
Date
(type: string)
Additional Properties
| Prop | Type | Default | Description | |------|------|---------|-------------| |mode |string (date, time, datetime) |date | Mode for the date picker | |minDate |string (date in format "YYYY-MM-DD", "today", "tomorrow") or JS Date |N/A |Minimum date in datepicker | |maxDate |string (date in format "YYYY-MM-DD", "today", "tomorrow") or JS Date |N/A |Miximum date in datepicker |
Value Type
String
Default Value Type
string (date in format "YYYY-MM-DD", "today", "tomorrow") or JS Date integer(number of minutes to be added/subtracted from current date) e.g. +60 (means 60 minutes forward) -60
Select
Type
{ type: select }
Additional Properties
| Prop | Type | Default | Required | Description | |------|------|---------|-------------|------------| |multiple |bool |false | No | Allow single or multiple selection | |objectType |string |false | No | Minimum date in datepicker | |labelKey |string |N/A | Yes, if Object Type is true | To define the key which value need to be used as label. | |primaryKey |string |N/A | Yes, if Object Type is true | To define the key which is unique in all objects. | |options |string |N/A | Yes | To define the key which is unique in all objects. |
Value Type
- Array of Strings
["Option 1", "Option 2, "Option 3"]- Array of Objects
"options": [
{
"user_id": 1,
"user_name": "Sharath"
},
{
"user_id": 2,
"user_name": "Rabindra"
},
{
"user_id": 3,
"user_name": "Nitheesh"
}
],Default Value Type
- String
If the options are array of strings
["Option 1", "Option 3"]- Object If options are array of objects
defaultValue : [
{
"user_id": 3,
"user_name": "Nitheesh"
}
]Lookup
Type
{ type: lookup }
Lookup is similar to select. Lookup is useful is auto-populating data from the master data. e.g if there is a master data of users, then lookup can be used to select the user and then other reference fields will be auto populated
see the example 10-lookup.json (https://github.com/sharathchandramg/react-native-formo/blob/master/example/sampleformo/schema/10-lookup.json)
Additional Properties
| Prop | Type | Default | Required | Description | |------|------|---------|-------------|------------| |multiple |bool |false | No | Allow single or multiple selection | |objectType |string |false | No | Minimum date in datepicker | |labelKey |string |N/A | Yes, if Object Type is true | To define the key which value need to be used as label. | |primaryKey |string |N/A | Yes, if Object Type is true | To define the key which is unique in all objects. | |options |string |N/A | Yes | To define the key which is unique in all objects. |
Value Type
- Array of Strings
["Option 1", "Option 2, "Option 3"]- Array of Objects
"options": [
{
"user_id": 1,
"user_name": "Sharath",
"email" : "[email protected]",
"phone" : "1234567890"
},
{
"user_id": 2,
"user_name": "Rabindra",
"email" : "[email protected]",
"phone" : "1234567890"
},
{
"user_id": 3,
"user_name": "Nitheesh",
"email" : "[email protected]",
"phone" : "1234567890"
}
],Default Value Type
- String
If the options are array of strings
["Option 1", "Option 3"]- Object If options are array of objects
defaultValue : [
{
"user_id": 3,
"user_name": "Nitheesh",
"email" : "[email protected]",
"phone" : "1234567890"
}
]Extended Features
- Populate the options list from remote API/Storage. We have exposed 'onGetQuery' function, so you can bind your function and update the options list. To achive it you have to configure the 'data_source'.You will able to access the data_source's params and call remote API/Storage. If your data_source type is remote, you have to bind the 'onGetQuery'.function else it is not required. The default type is local,which means options list is pre populated.
"data_source" : {
"type" : "local/remote",
"key" : "" ,
"url": "",
} - Search and Filter We have exposed 'onSearchQuery` function, so if your options list is large and you need to search,bind your function and update the options list. To enable it confure 'additional'. Similary for filter, but for filter you have to configure the 'filterCategory' also. The filterCategory is the list of key from options's object on which filter will be applied.
"additional":{
"searchEnable":true,
"filterEnable":true
},
"filterCategory":["user_name","phone"]
Sub Form
Allows to have multiple nested complex objects. This is useful if we need to record multiple instances of data e.g. see the example 10-lookup.json (https://github.com/sharathchandramg/react-native-formo/blob/master/example/sampleformo/schema/11-sub-form.json)
Type
{ type: sub-form }
Location
Allows to record the geo-location of the device. This requires the user to provide access to the read the location data
Type
{ type: location }
Value Type
Object ({ latitude : "", longitude : "" })
Image
Type
{ type: image }
Image with additional configuration
Allows to configure additional properties like mode, multiple and number of files.The default value for mode, multiple and max_files are low-resolution,false and 1 respectively,
{
"additional_config" : {
"mode":"high-resolution",
"multiple":true,
"max_files": 5
}
}
Document
Calculated
Prefill form data (Edit mode)
Pass the data to be prefilled as formData property
formData = {
first_name : 'Sha',
last_name: 'Snow',
house: 'Winterfell',
status: 'Sad'
}