Schema for data modeling & validation
- Installation
- Usage
- API
- SchemaModel
- MixedType()
isRequired(errorMessage?: string, trim: boolean = true)isRequiredOrEmpty(errorMessage?: string, trim: boolean = true)addRule(onValid: Function, errorMessage?: string, priority: boolean)when(condition: (schemaSpec: SchemaDeclaration<DataType, ErrorMsgType>) => Type)check(value: ValueType, data?: DataType):CheckResultcheckAsync(value: ValueType, data?: DataType):Promise<CheckResult>
- StringType(errorMessage?: string)
isEmail(errorMessage?: string)isURL(errorMessage?: string)isOneOf(items: string[], errorMessage?: string)containsLetter(errorMessage?: string)containsUppercaseLetter(errorMessage?: string)containsLowercaseLetter(errorMessage?: string)containsLetterOnly(errorMessage?: string)containsNumber(errorMessage?: string)pattern(regExp: RegExp, errorMessage?: string)rangeLength(minLength: number, maxLength: number, errorMessage?: string)minLength(minLength: number, errorMessage?: string)maxLength(maxLength: number, errorMessage?: string)
- NumberType(errorMessage?: string)
- ArrayType(errorMessage?: string)
- DateType(errorMessage?: string)
- ObjectType(errorMessage?: string)
- BooleanType(errorMessage?: string)
⚠️ Notes
npm install schema-typed --save
import { SchemaModel, StringType, DateType, NumberType, ObjectType, ArrayType } from 'schema-typed';
const model = SchemaModel({
username: StringType().isRequired('Username required'),
email: StringType().isEmail('Email required'),
age: NumberType('Age should be a number').range(18, 30, 'Over the age limit'),
tags: ArrayType().of(StringType('The tag should be a string').isRequired()),
role: ObjectType().shape({
name: StringType().isRequired('Name required'),
permissions: ArrayType().isRequired('Permissions required')
})
});
const checkResult = model.check({
username: 'foobar',
email: '[email protected]',
age: 40,
tags: ['Sports', 'Games', 10],
role: { name: 'administrator' }
});
console.log(checkResult);checkResult return structure is:
{
username: { hasError: false },
email: { hasError: false },
age: { hasError: true, errorMessage: 'Over the age limit' },
tags: {
hasError: true,
array: [
{ hasError: false },
{ hasError: false },
{ hasError: true, errorMessage: 'The tag should be a string' }
]
},
role: {
hasError: true,
object: {
name: { hasError: false },
permissions: { hasError: true, errorMessage: 'Permissions required' }
}
}
};StringType()
.minLength(6, "Can't be less than 6 characters")
.maxLength(30, 'Cannot be greater than 30 characters')
.isRequired('This field required');Customize a rule with the addRule function.
If you are validating a string type of data, you can set a regular expression for custom validation by the pattern method.
const model = SchemaModel({
field1: StringType().addRule((value, data) => {
return /^[1-9][0-9]{3}\s?[a-zA-Z]{2}$/.test(value);
}, 'Please enter legal characters'),
field2: StringType().pattern(/^[1-9][0-9]{3}\s?[a-zA-Z]{2}$/, 'Please enter legal characters')
});
model.check({ field1: '', field2: '' });
/**
{
field1: {
hasError: true,
errorMessage: 'Please enter legal characters'
},
field2: {
hasError: true,
errorMessage: 'Please enter legal characters'
}
};
**/E.g: verify that the two passwords are the same.
const model = SchemaModel({
password1: StringType().isRequired('This field required'),
password2: StringType().addRule((value, data) => {
if (value !== data.password1) {
return false;
}
return true;
}, 'The passwords are inconsistent twice')
});
model.check({ password1: '123456', password2: 'root' });
/**
{
password1: { hasError: false },
password2: {
hasError: true,
errorMessage: 'The passwords are inconsistent twice'
}
}
**/For example, verify that the mailbox is duplicated
function asyncCheckEmail(email) {
return new Promise(resolve => {
setTimeout(() => {
if (email === '[email protected]') {
resolve(false);
} else {
resolve(true);
}
}, 500);
});
}
const model = SchemaModel({
email: StringType()
.isEmail('Please input the correct email address')
.addRule((value, data) => {
return asyncCheckEmail(value);
}, 'Email address already exists')
.isRequired('This field cannot be empty')
});
model.checkAsync({ email: '[email protected]' }).then(checkResult => {
console.log(checkResult);
/**
{
email: {
hasError: true,
errorMessage: 'Email address already exists'
}
};
**/
});Validate nested objects, which can be defined using the ObjectType().shape method. E.g:
const model = SchemaModel({
id: NumberType().isRequired('This field required'),
name: StringType().isRequired('This field required'),
info: ObjectType().shape({
email: StringType().isEmail('Should be an email'),
age: NumberType().min(18, 'Age should be greater than 18 years old')
})
});
const user = {
id: 1,
name: '',
info: { email: 'schema-type', age: 17 }
};
model.check(data);
/**
{
"id": { "hasError": false },
"name": { "hasError": true, "errorMessage": "This field required" },
"info": {
"hasError": true,
"object": {
"email": { "hasError": true, "errorMessage": "Should be an email" },
"age": { "hasError": true, "errorMessage": "Age should be greater than 18 years old" }
}
}
}
*/SchemaModel provides a static method combine that can be combined with multiple SchemaModel to return a new SchemaModel.
const model1 = SchemaModel({
username: StringType().isRequired('This field required'),
email: StringType().isEmail('Should be an email')
});
const model2 = SchemaModel({
username: StringType().minLength(7, "Can't be less than 7 characters"),
age: NumberType().range(18, 30, 'Age should be greater than 18 years old')
});
const model3 = SchemaModel({
groupId: NumberType().isRequired('This field required')
});
const model4 = SchemaModel.combine(model1, model2, model3);
model4.check({
username: 'foobar',
email: '[email protected]',
age: 40,
groupId: 1
});SchemaModel is a JavaScript schema builder for data model creation and validation.
A static method for merging multiple models.
const model1 = SchemaModel({
username: StringType().isRequired('This field required')
});
const model2 = SchemaModel({
email: StringType().isEmail('Please input the correct email address')
});
const model3 = SchemaModel.combine(model1, model2);Check whether the data conforms to the model shape definition. Return a check result.
const model = SchemaModel({
username: StringType().isRequired('This field required'),
email: StringType().isEmail('Please input the correct email address')
});
model.check({
username: 'root',
email: '[email protected]'
});Asynchronously check whether the data conforms to the model shape definition. Return a check result.
const model = SchemaModel({
username: StringType()
.isRequired('This field required')
.addRule(value => {
return new Promise(resolve => {
// Asynchronous processing logic
});
}, 'Username already exists'),
email: StringType().isEmail('Please input the correct email address')
});
model
.checkAsync({
username: 'root',
email: '[email protected]'
})
.then(result => {
// Data verification result
});Check whether a field in the data conforms to the model shape definition. Return a check result.
const model = SchemaModel({
username: StringType().isRequired('This field required'),
email: StringType().isEmail('Please input the correct email address')
});
const data = {
username: 'root'
};
model.checkForField('username', data);Asynchronously check whether a field in the data conforms to the model shape definition. Return a check result.
const model = SchemaModel({
username: StringType()
.isRequired('This field required')
.addRule(value => {
return new Promise(resolve => {
// Asynchronous processing logic
});
}, 'Username already exists'),
email: StringType().isEmail('Please input the correct email address')
});
const data = {
username: 'root'
};
model.checkForFieldAsync('username', data).then(result => {
// Data verification result
});Creates a type that matches all types. All types inherit from this base type.
MixedType().isRequired('This field required');MixedType().isRequiredOrEmpty('This field required');MixedType().addRule((value, data) => {
return /^[1-9][0-9]{3}\s?[a-zA-Z]{2}$/.test(value);
}, 'Please enter a legal character.');Define data verification rules based on conditions.
const model = SchemaModel({
age: NumberType().min(18, 'error'),
contact: MixedType().when(schema => {
const checkResult = schema.age.check();
return checkResult.hasError
? StringType().isRequired('Please provide contact information')
: StringType();
})
});
/**
{
age: { hasError: false },
contact: { hasError: false }
}
*/
model.check({ age: 18, contact: '' });
/*
{
age: { hasError: true, errorMessage: 'error' },
contact: {
hasError: true,
errorMessage: 'Please provide contact information'
}
}
*/
model.check({ age: 17, contact: '' });const type = MixedType().addRule(v => {
if (typeof v === 'number') {
return true;
}
return false;
}, 'Please enter a valid number');
type.check('1'); // { hasError: true, errorMessage: 'Please enter a valid number' }
type.check(1); // { hasError: false }const type = MixedType().addRule(v => {
return new Promise(resolve => {
setTimeout(() => {
if (typeof v === 'number') {
resolve(true);
} else {
resolve(false);
}
}, 500);
});
}, 'Please enter a valid number');
type.checkAsync('1').then(checkResult => {
// { hasError: true, errorMessage: 'Please enter a valid number' }
});
type.checkAsync(1).then(checkResult => {
// { hasError: false }
});Define a string type. Supports all the same methods as MixedType.
StringType().isEmail('Please input the correct email address');StringType().isURL('Please enter the correct URL address');StringType().isOneOf(['Javascript', 'CSS'], 'Can only type `Javascript` and `CSS`');StringType().containsLetter('Must contain English characters');StringType().containsUppercaseLetter('Must contain uppercase English characters');StringType().containsLowercaseLetter('Must contain lowercase English characters');StringType().containsLetterOnly('English characters that can only be included');StringType().containsNumber('Must contain numbers');StringType().pattern(/^[1-9][0-9]{3}\s?[a-zA-Z]{2}$/, 'Please enter legal characters');StringType().rangeLength(6, 30, 'The number of characters can only be between 6 and 30');StringType().minLength(6, 'Minimum 6 characters required');StringType().maxLength(30, 'The maximum is only 30 characters.');Define a number type. Supports all the same methods as MixedType.
NumberType().isInteger('It can only be an integer');NumberType().isOneOf([5, 10, 15], 'Can only be `5`, `10`, `15`');NumberType().pattern(/^[1-9][0-9]{3}$/, 'Please enter a legal character.');NumberType().range(18, 40, 'Please enter a number between 18 - 40');NumberType().min(18, 'Minimum 18');NumberType().max(40, 'Maximum 40');Define a array type. Supports all the same methods as MixedType.
ArrayType().isRequiredOrEmpty('This field required');ArrayType().rangeLength(1, 3, 'Choose at least one, but no more than three');ArrayType().minLength(1, 'Choose at least one');ArrayType().maxLength(3, "Can't exceed three");ArrayType().unrepeatable('Duplicate options cannot appear');ArrayType().of(StringType('The tag should be a string').isRequired());Define a date type. Supports all the same methods as MixedType.
DateType().range(
new Date('08/01/2017'),
new Date('08/30/2017'),
'Date should be between 08/01/2017 - 08/30/2017'
);DateType().min(new Date('08/01/2017'), 'Minimum date 08/01/2017');DateType().max(new Date('08/30/2017'), 'Maximum date 08/30/2017');Define a object type. Supports all the same methods as MixedType.
ObjectType().shape({
email: StringType().isEmail('Should be an email'),
age: NumberType().min(18, 'Age should be greater than 18 years old')
});Define a boolean type. Supports all the same methods as MixedType.
Default check priority:
- 1.isRequired
- 2.All other checks are executed in sequence
If the third argument to addRule is true, the priority of the check is as follows:
- 1.addRule
- 2.isRequired
- 3.Predefined rules (if there is no isRequired, value is empty, the rule is not executed)