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loopback-datasource-juggler
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Include property value in the error message 

When building a list of errors for `ValidationError.message`, include
the values of invalid properties too.

In order to keep the message reasonably short, the values are truncated
at approx 32 characters.
This commit is contained in:
Miroslav Bajtoš 2015-01-12 14:52:54 +01:00
parent 2270ba4db4
commit 9b759c95ac
4 changed files with 143 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
lib/validations.js
View File

@ -735,7 +735,7 @@ function ValidationError(obj) {
this.message = util.format(
'The %s instance is not valid. Details: %s.',
context ? '`' + context + '`' : 'model',
formatErrors(obj.errors) || '(unknown)'
formatErrors(obj.errors, obj.toJSON()) || '(unknown)'
);
this.statusCode = 422;
@ -761,7 +761,9 @@ util.inherits(ValidationError, Error);
var errorHasStackProperty = !!(new Error).stack;
function formatErrors(errors) {
ValidationError.maxPropertyStringLength = 32;
function formatErrors(errors, propertyValues) {
var DELIM = '; ';
errors = errors || {};
return Object.getOwnPropertyNames(errors)
@ -770,9 +772,52 @@ function formatErrors(errors) {
})
.map(function(propertyName) {
var messages = errors[propertyName];
var propertyValue = propertyValues[propertyName];
return messages.map(function(msg) {
return '`' + propertyName + '` ' + msg;
return formatPropertyError(propertyName, propertyValue, msg);
}).join(DELIM);
})
.join(DELIM);
}
function formatPropertyError(propertyName, propertyValue, errorMessage) {
var formattedValue;
var valueType = typeof propertyValue;
if (valueType === 'string') {
formattedValue = JSON.stringify(truncatePropertyString(propertyValue));
} else if (propertyValue instanceof Date) {
formattedValue = propertyValue.toISOString();
} else if (valueType === 'object') {
// objects and arrays
formattedValue = util.inspect(propertyValue, {
showHidden: false,
color: false,
// show top-level object properties only
depth: Array.isArray(propertyValue) ? 1 : 0
});
formattedValue = truncatePropertyString(formattedValue);
} else {
formattedValue = truncatePropertyString('' + propertyValue);
}
return '`' + propertyName + '` ' + errorMessage +
' (value: ' + formattedValue + ')';
}
function truncatePropertyString(value) {
var len = ValidationError.maxPropertyStringLength;
if (value.length <= len) return value;
// preserve few last characters like `}` or `]`, but no more than 3
// this way the last `} ]` in the array of objects is included in the message
var tail;
var m = value.match(/([ \t})\]]+)$/);
if (m) {
tail = m[1].slice(-3);
len -= tail.length;
} else {
tail = value.slice(-3);
len -= 3;
}
return value.slice(0, len-4) + '...' + tail;
}

4
test/manipulation.test.js
View File

@ -66,8 +66,8 @@ describe('manipulation', function () {
it('should not allow user-defined value for the id of object - create', function (done) {
Person.create({id: 123456}, function (err, p) {
err.should.be.instanceof(ValidationError);
err.message.should.equal('The `Person` instance is not valid. Details: `id` can\'t be set.');
err.statusCode.should.equal(422);
err.details.messages.id.should.eql(['can\'t be set']);
p.should.be.instanceof(Person);
p.id.should.equal(123456);
p.isNewRecord().should.be.true;
@ -80,8 +80,8 @@ describe('manipulation', function () {
p.isNewRecord().should.be.true;
p.save(function(err, inst) {
err.should.be.instanceof(ValidationError);
err.message.should.equal('The `Person` instance is not valid. Details: `id` can\'t be set.');
err.statusCode.should.equal(422);
err.details.messages.id.should.eql(['can\'t be set']);
inst.id.should.equal(123456);
inst.isNewRecord().should.be.true;
done();

20
test/relations.test.js
View File

@ -2111,9 +2111,7 @@ describe('relations', function () {
p.passportItem.create({}, function(err, passport) {
should.exist(err);
err.name.should.equal('ValidationError');
var msg = 'The `Passport` instance is not valid.';
msg += ' Details: `name` can\'t be blank.';
err.message.should.equal(msg);
err.details.messages.name.should.eql(['can\'t be blank']);
done();
});
});
@ -2125,9 +2123,8 @@ describe('relations', function () {
p.save(function(err) {
should.exist(err);
err.name.should.equal('ValidationError');
var msg = 'The `Person` instance is not valid.';
msg += ' Details: `passportItem` is invalid: `name` can\'t be blank.';
err.message.should.equal(msg);
err.details.messages.passportItem
.should.eql(['is invalid: `name` can\'t be blank']);
done();
});
});
@ -2568,9 +2565,9 @@ describe('relations', function () {
addresses.push({ id: 'work', street: '' });
Person.create({ name: 'Wilma', addresses: addresses }, function(err, p) {
err.name.should.equal('ValidationError');
var expected = 'The `Person` instance is not valid. ';
expected += 'Details: `addresses` contains invalid item: `work` (`street` can\'t be blank).';
err.message.should.equal(expected);
err.details.messages.addresses.should.eql([
'contains invalid item: `work` (`street` can\'t be blank)'
]);
done();
});
});
@ -2769,7 +2766,7 @@ describe('relations', function () {
err.name.should.equal('ValidationError');
err.details.codes.street.should.eql(['presence']);
var expected = 'The `Address` instance is not valid. ';
expected += 'Details: `street` can\'t be blank.';
expected += 'Details: `street` can\'t be blank (value: undefined).';
err.message.should.equal(expected);
done();
});
@ -3225,9 +3222,6 @@ describe('relations', function () {
should.exist(err);
err.name.should.equal('ValidationError');
err.details.codes.jobs.should.eql(['uniqueness']);
var expected = 'The `Category` instance is not valid. ';
expected += 'Details: `jobs` contains duplicate `Job` instance.';
err.message.should.equal(expected);
done();
});
});

71
test/validations.test.js
View File

@ -211,6 +211,16 @@ describe('validations', function () {
});
});
it('should include property value in err.message', function(done) {
delete User.validations;
User.validatesPresenceOf('name');
User.create(function (e, u) {
should.exist(e);
e.message.should.match(/`name` can't be blank \(value: undefined\)/);
done();
});
});
it('should include model name in err.message', function(done) {
delete User.validations;
User.validatesPresenceOf('name');
@ -432,4 +442,65 @@ describe('validations', function () {
})).should.be.false;
});
});
describe('invalid value formatting', function() {
var origMaxLen;
beforeEach(function saveAndSetMaxLen() {
origMaxLen = ValidationError.maxPropertyStringLength;
});
afterEach(function restoreMaxLen() {
ValidationError.maxPropertyStringLength = origMaxLen;
});
it('should truncate long strings', function() {
ValidationError.maxPropertyStringLength = 9;
var err = givenValidationError('prop', '1234567890abc', 'is invalid');
getErrorDetails(err)
.should.equal('`prop` is invalid (value: "12...abc").');
});
it('should truncate long objects', function() {
ValidationError.maxPropertyStringLength = 12;
var err = givenValidationError('prop', { foo: 'bar' }, 'is invalid');
getErrorDetails(err)
.should.equal('`prop` is invalid (value: { foo:... }).');
});
it('should truncate long arrays', function() {
ValidationError.maxPropertyStringLength = 12;
var err = givenValidationError('prop', [{ a: 1, b: 2}], 'is invalid');
getErrorDetails(err)
.should.equal('`prop` is invalid (value: [ { a...} ]).');
});
it('should print only top-level object properties', function() {
var err = givenValidationError('prop', { a: { b: 'c' }}, 'is invalid');
getErrorDetails(err)
.should.equal('`prop` is invalid (value: { a: [Object] }).');
});
it('should print only top-level props of objects in array', function() {
var err = givenValidationError('prop', [{ a: { b: 'c' }}], 'is invalid');
getErrorDetails(err)
.should.equal('`prop` is invalid (value: [ { a: [Object] } ]).');
});
function givenValidationError(propertyName, propertyValue, errorMessage) {
var jsonVal = {};
jsonVal[propertyName] = propertyValue;
var errorVal = {};
errorVal[propertyName] = [errorMessage];
var obj = {
errors: errorVal,
toJSON: function() { return jsonVal; }
};
return new ValidationError(obj);
}
function getErrorDetails(err) {
return err.message.replace(/^.*Details: /, '');
}
});
});