I have below snippet of code.
TestMsgCenter msgLog = TestMsgCenter.findByIp("localhost")
if (msgLog != null) {
msgLog.setClothDate(new Date())
msgLog.merge()
} else {
msgLog.setClothType("Lets")
msgLog.setClothDate(new Date())
msgLog.setClothId("Go")
msgLog.save()
}
How to handle null case in above else block?
You are trying to assign a values to a null object.
You need to instantiate one:
TestMsgCenter msgLog = TestMsgCenter.findByIp("localhost")
if (msgLog != null) {
msgLog.setClothDate(new Date())
msgLog.merge()
} else {
msgLog = new MsgLog(); //here
msgLog.setClothType("Lets")
msgLog.setClothDate(new Date())
msgLog.setClothId("Go")
msgLog.save()
}
Related
i am trying to get the records from the database using spring data jpa Speicification API.
here i need to put a condition for "In" clause for status column, for that i am code like below.
public static Specification<UserEntity> userSpecificationsforOperator(String orgName, String groupID,
List<String> status, Date startDate, Date endDate) {
return (root, query, builder) -> {
List<Predicate> predicates = new ArrayList<>();
if (orgName != null) {
Join<UserEntity, OrganizationEntity> organization = root.join("organization");
predicates.add(builder.equal(organization.get("name"), orgName));
}
/*
* if (groupID != null) {
* predicates.add(builder.equal(root.get("refApprovalGroupId"), groupID)); }
*/
if (status != null && status.size()>0) {
predicates.add(root.get("status").in(status));
}
if (startDate != null) {
predicates.add(builder.greaterThanOrEqualTo(root.get("createdDate"), startDate.toInstant()));
}
if (endDate != null) {
predicates.add(builder.lessThanOrEqualTo(root.get("createdDate"), endDate.toInstant()));
}
Predicate[] p = predicates.toArray(new Predicate[predicates.size()]);
return p.length == 0 ? null : p.length == 1 ? p[0] : builder.and(p);
};
}
the above code generating the query in cosole like below
SELECT userentity0_.id AS id1_68_,
userentity0_.created_by AS created_2_68_,
userentity0_.created_date AS created_3_68_,
userentity0_.last_modified_by AS last_mod4_68_,
userentity0_.last_modified_date AS last_mod5_68_,
userentity0_.group_id AS group_id6_68_,
userentity0_.group_name AS group_na7_68_,
userentity0_.is_enrollment_updated AS is_enrol8_68_,
userentity0_.is_federated AS is_feder9_68_,
userentity0_.name AS name10_68_,
userentity0_.organization_id AS organiz17_68_,
userentity0_.ref_approval_group_id AS ref_app11_68_,
userentity0_.reference_name AS referen12_68_,
userentity0_.status AS status13_68_,
userentity0_.uims_id AS uims_id14_68_,
userentity0_.user_status AS user_st15_68_,
userentity0_.version AS version16_68_
FROM user userentity0_
INNER JOIN organization organizati1_
ON userentity0_.organization_id = organizati1_.id
WHERE organizati1_.name ='utopia'
AND ( userentity0_.status =(?,?)
when i take the query into db tool and passing the values i am getting the data.
but while running from the application i am not getting the data.
here i understood that i am able to generate the query properly but my values are not passing correctly.
so could you please suggest how i can get my code return the data.
Maybe the implementation of it causes the issue...
Here, use this and let me know if it works
if (status != null && status.size()>0) {
predicates.add(builder.in(root.get("status")).value(status));
}
I have a ldap method that returns all users that are in it (almost 1300 users) and I want to return them by page, similar to what PagingAndSortingRepository does in Springboot:
If I have this endpoint ( users/?page=0&size=1 )and I wnat to return on page 0 just 1 entry.
Is there any way to do that?
Currently I have this but it doesn´t work:
SearchRequest searchRequest = new SearchRequest(ldapConfig.getBaseDn(), SearchScope.SUB,
Filter.createEqualityFilter("objectClass", "person"));
ASN1OctetString resumeCookie = null;
while (true) {
searchRequest.setControls(new SimplePagedResultsControl(pageable.getPageSize(), resumeCookie));
SearchResult searchResult = ldapConnection.search(searchRequest);
numSearches++;
totalEntriesReturned += searchResult.getEntryCount();
for (SearchResultEntry e : searchResult.getSearchEntries()) {
String[] completeDN = UaaUtils.searchCnInDn(e.getDN());
String[] username = completeDN[0].split("=");
UserEntity u = new UserEntity(username[1]);
list.add(u);
System.out.println("TESTE");
}
SimplePagedResultsControl responseControl = SimplePagedResultsControl.get(searchResult);
if (responseControl.moreResultsToReturn()) {
// The resume cookie can be included in the simple paged results
// control included in the next search to get the next page of results.
System.out.println("Antes "+resumeCookie);
resumeCookie = responseControl.getCookie();
System.out.println("Depois "+resumeCookie);
} else {
break;
}
Page<UserEntity> newPage = new PageImpl<>(list, pageable, totalEntriesReturned);
System.out.println("content " + newPage.getContent());
System.out.println("total elements " + newPage.getTotalElements());
System.out.println(totalEntriesReturned);
}
I'm unsure if this is the proper way, but here's how I went about it:
public PaginatedLookup getAll(String page, String perPage) {
PagedResultsCookie cookie = null;
List<LdapUser> results;
try {
if ( page != null ) {
cookie = new PagedResultsCookie(Hex.decode(page));
} // end if
Integer pageSize = perPage != null ? Integer.parseInt(perPage) : PROCESSOR_PAGE_SIZE;
PagedResultsDirContextProcessor processor = new PagedResultsDirContextProcessor(pageSize, cookie);
LdapName base = LdapUtils.emptyLdapName();
SearchControls sc = new SearchControls();
sc.setSearchScope(SearchControls.SUBTREE_SCOPE);
sc.setTimeLimit(THREE_SECONDS);
sc.setCountLimit(pageSize);
sc.setReturningAttributes(new String[]{"cn", "title"});
results = ldapTemplate.search(base, filter.encode(), sc, new PersonAttributesMapper(), processor);
cookie = processor.getCookie();
} catch ( Exception e ) {
log.error(e.getMessage());
return null;
} // end try-catch
String nextPage = null;
if ( cookie != null && cookie.getCookie() != null ) {
nextPage = new String(Hex.encode(cookie.getCookie()));
} // end if
return new PaginatedLookup(nextPage, results);
}
The main issue I kept on hitting was trying to get the cookie as something that could be sent to the client, which is where my Hex.decode and Hex.encode came in handy.
PersonAttributesMapper is a private mapper that I have to make the fields more human readable, and PaginatedLookup is a custom class I use for API responses.
I'm trying to write following LINQ query using ServiceStack Ormlite.
dbConn.Select<Product>(p => p.IsActive.HasValue && p.IsActive.Value)
Here, Product is my item class and "IsActive" is Nullable Bool property in that class. When this line executes it always throws "InvalidOperationException" with the message
variable 'p' of type '' referenced from scope '', but it is not defined
I tried different variants as following but still same exception result
dbConn.Select<Product>(p => p.IsActive.HasValue == true && p.IsActive.Value == true)
dbConn.Select<Product>(p => p.IsActive != null && p.IsActive.Value == true)
But if I just write
dbConn.Select<Product>(p => p.IsActive.HasValue)
then it works.
I'm puzzled what is the problem? Is this servicestack ormlite issue?
My answer can handle Nullable value like "value" and "HasValue" with servicestack ormlite. And But also with datetime nullable ,like 'createdate.value.Year'.
you must change two place.
modify VisitMemberAccess method:
protected virtual object VisitMemberAccess(MemberExpression m)
{
if (m.Expression != null)
{
if (m.Member.DeclaringType.IsNullableType())
{
if (m.Member.Name == nameof(Nullable<bool>.Value))
return Visit(m.Expression);
if (m.Member.Name == nameof(Nullable<bool>.HasValue))
{
var doesNotEqualNull = Expression.NotEqual(m.Expression, Expression.Constant(null));
return Visit(doesNotEqualNull); // Nullable<T>.HasValue is equivalent to "!= null"
}
throw new ArgumentException(string.Format("Expression '{0}' accesses unsupported property '{1}' of Nullable<T>", m, m.Member));
}
if (m.Member.DeclaringType == typeof(DateTime))
{
var ExpressionInfo = m.Expression as MemberExpression;
if (ExpressionInfo.Member.DeclaringType.IsNullableType())
{
if (ExpressionInfo.Member.Name == nameof(Nullable<bool>.Value))
{
var modelType = (ExpressionInfo.Expression as MemberExpression).Expression.Type;
var tableDef = modelType.GetModelDefinition();
var columnName = (ExpressionInfo.Expression as MemberExpression).Member.Name;
var QuotedColumnName = GetQuotedColumnName(tableDef, columnName);
if (m.Member.Name == "Year")
{
return new PartialSqlString(string.Format("DATEPART(yyyy,{0})", QuotedColumnName));
}
if (m.Member.Name == "Month")
return new PartialSqlString(string.Format("DATEPART(mm,{0})", QuotedColumnName));
}
if (ExpressionInfo.Member.Name == nameof(Nullable<bool>.HasValue))
{
var doesNotEqualNull = Expression.NotEqual(ExpressionInfo.Expression, Expression.Constant(null));
return Visit(doesNotEqualNull); // Nullable<T>.HasValue is equivalent to "!= null"
}
}
else
{
var modelType = ExpressionInfo.Expression.Type;
var tableDef = modelType.GetModelDefinition();
var columnName = ExpressionInfo.Member.Name;
var QuotedColumnName = GetQuotedColumnName(tableDef, columnName);
if (m.Member.Name == "Year")
return new PartialSqlString(string.Format("DATEPART(yyyy,{0})", QuotedColumnName));
if (m.Member.Name == "Month")
return new PartialSqlString(string.Format("DATEPART(mm,{0})", QuotedColumnName));
}
}
if (m.Expression.NodeType == ExpressionType.Parameter || m.Expression.NodeType == ExpressionType.Convert)
{
var propertyInfo = (PropertyInfo)m.Member;
var modelType = m.Expression.Type;
if (m.Expression.NodeType == ExpressionType.Convert)
{
var unaryExpr = m.Expression as UnaryExpression;
if (unaryExpr != null)
{
modelType = unaryExpr.Operand.Type;
}
}
var tableDef = modelType.GetModelDefinition();
if (propertyInfo.PropertyType.IsEnum)
return new EnumMemberAccess(
GetQuotedColumnName(tableDef, m.Member.Name), propertyInfo.PropertyType);
return new PartialSqlString(GetQuotedColumnName(tableDef, m.Member.Name));
}
}
var member = Expression.Convert(m, typeof(object));
var lambda = Expression.Lambda<Func<object>>(member);
var getter = lambda.Compile();
return getter();
}
modify VisitLambda method :
protected virtual object VisitLambda(LambdaExpression lambda)
{
if (lambda.Body.NodeType == ExpressionType.MemberAccess && sep == " ")
{
MemberExpression m = lambda.Body as MemberExpression;
if (m.Expression != null)
{
string r = VisitMemberAccess(m).ToString();
if (m.Member.DeclaringType.IsNullableType())
return r;
return string.Format("{0}={1}", r, GetQuotedTrueValue());
}
}
return Visit(lambda.Body);
}
This is nature of the Linq. In order to achieve what you need, you will need to use two where closes:
dbConn.Where<Product>(p => p.IsActive.HasValue).Where(p=>p.Value==true);
I have coded a JPA repository method and I am now realizing it is impossible to unit test.
Can anyone please advise how to unit test the following method or how to refactor my repository so that it is unit-testable?
Here is the problematic method:
#Override
public List<Pli> findPlisByMultiField(String identifiant, Date dateReceptionFrom, Date dateReceptionTo, PaiementEnum paiement, AREnum ar, String numeroAR, FDVEnum FDV, ConteneurNum conteneurNum, StatutPli statut) {
log.debug("findPlisByMultiField");
CriteriaBuilder criteriaBuilder = em.getCriteriaBuilder();
CriteriaQuery<Pli> c = criteriaBuilder.createQuery(Pli.class);
Root<Pli> pli = c.from(Pli.class);
List<Predicate> criteria = new ArrayList<Predicate>();
if (identifiant != null && !identifiant.trim().equals("")) {
ParameterExpression<String> parameterIdentifiant = criteriaBuilder.parameter(String.class, "identifiant");
Predicate conditionIdentifiant = criteriaBuilder.like(pli.<String> get("identifiant"), parameterIdentifiant);
criteria.add(conditionIdentifiant);
}
if (dateReceptionFrom != null && dateReceptionTo != null) {
ParameterExpression<Date> parameterDateReceptionFrom = criteriaBuilder.parameter(Date.class, "dateReceptionFrom");
ParameterExpression<Date> parameterDateReceptionTo = criteriaBuilder.parameter(Date.class, "dateReceptionTo");
Predicate conditionDateReception = criteriaBuilder.between(pli.<Date> get("dateReception"), parameterDateReceptionFrom, parameterDateReceptionTo);
criteria.add(conditionDateReception);
}
if (paiement != null) {
if (paiement.equals(PaiementEnum.IsPaiement)) {
Predicate conditionPaiementEnum = criteriaBuilder.equal(pli.<PaiementEnum> get("paiement"), true);
criteria.add(conditionPaiementEnum);
} else {
Predicate conditionPaiementEnum = criteriaBuilder.equal(pli.<PaiementEnum> get("paiement"), false);
criteria.add(conditionPaiementEnum);
}
}
if (ar != null) {
if (ar.equals(AREnum.IsAR)) {
Predicate conditionAREnum = criteriaBuilder.equal(pli.<AREnum> get("AR"), true);
criteria.add(conditionAREnum);
} else {
Predicate conditionAREnum = criteriaBuilder.equal(pli.<AREnum> get("AR"), false);
criteria.add(conditionAREnum);
}
}
if (numeroAR != null && !numeroAR.trim().equals("")) {
ParameterExpression<String> parameterNumeroAR = criteriaBuilder.parameter(String.class, "numeroAR");
Predicate conditionNumeroAR = criteriaBuilder.like(pli.<String> get("numeroAR"), parameterNumeroAR);
criteria.add(conditionNumeroAR);
}
if (FDV != null) {
if (FDV.equals(FDVEnum.IsFDV)) {
Predicate conditionFDVEnum = criteriaBuilder.equal(pli.<FDVEnum> get("FDV"), true);
criteria.add(conditionFDVEnum);
} else {
Predicate conditionFDVEnum = criteriaBuilder.equal(pli.<FDVEnum> get("FDV"), false);
criteria.add(conditionFDVEnum);
}
}
if (conteneurNum != null) {
ParameterExpression<ConteneurNum> parameterConteneurNum = criteriaBuilder.parameter(ConteneurNum.class, "conteneurNum");
Predicate conditionConteneurNum = criteriaBuilder.equal(pli.<ConteneurNum> get("conteneurNum"), parameterConteneurNum);
criteria.add(conditionConteneurNum);
}
if (statut != null) {
ParameterExpression<StatutPli> parameterStatut = criteriaBuilder.parameter(StatutPli.class, "statut");
Predicate conditionStatut = criteriaBuilder.equal(pli.<StatutPli> get("statut"), parameterStatut);
criteria.add(conditionStatut);
}
if (criteria.size() == 0) {
return Pli.findAllPlis();
} else if (criteria.size() == 1) {
c.where(criteria.get(0));
} else {
c.where(criteriaBuilder.and(criteria.toArray(new Predicate[0])));
}
TypedQuery<Pli> q = em.createQuery(c);
if (identifiant != null && !identifiant.trim().equals("")) {
q.setParameter("identifiant", "%" + identifiant + "%");
}
if (dateReceptionFrom != null && dateReceptionTo != null) {
q.setParameter("dateReceptionFrom", dateReceptionFrom);
q.setParameter("dateReceptionTo", dateReceptionTo);
}
if (numeroAR != null && !numeroAR.trim().equals("")) {
q.setParameter("numeroAR", "%" + numeroAR + "%");
}
if (conteneurNum != null) {
q.setParameter("conteneurNum", conteneurNum);
}
if (statut != null) {
q.setParameter("statut", statut);
}
return q.getResultList();
}
Well, I don't think you will be able to Unit Test it as it's strictly specified, but you can make a test using an in memory database (look out for HSQL) so that the app don't need to actually go to the real database just for testing.
That way you will be able to create an automated test that could run inside JUnit for example, mocking maybe only some of the methods.
I have the following in my Controller
var workshop = registerDB.Workshops.Single(w => w.WorkshopID == id);
ViewBag.Enrollments = registerDB.Carts.Where(x => x.Username.Equals(User.Identity.Name));
and this in my view
#{
//var carts = Model.Carts.Where(x => x.Username.Equals(User.Identity.Name));
var carts = ViewBag.Enrollments;
var timeSlot = Model.TimeSlot;
}
#{
foreach (var item in carts)
{
if (item != null)
{
if (timeSlot == item.Workshop.TimeSlot)
{
<h3>#timeSlot</h3>
}
}
else
{
<h3>Does not Exist</h3>
}
}
}
each time ViewBag.Enrollments = registerDB.Carts.Where(x => x.Username.Equals(User.Identity.Name)); returns no results, I get an error saying System.InvalidOperationException: There is already an open DataReader associated with this Command which must be closed first. and this line is highlighted
if (timeSlot == item.Workshop.TimeSlot)
Try calling .ToList() in the controller to eagerly fetch the results:
ViewBag.Enrollments = registerDB
.Carts
.Where(x => x.Username.Equals(User.Identity.Name))
.ToList();
You are checking that item != null but not that item.Workshop != null before trying to use it. It would appear that is perhaps the error, but why it's raising InvalidOperationException rather than NullReferenceException I don't know.
Try:
if (item != null && item.Workshop != null)
{
if (timeSlot == item.Workshop.TimeSlot)
{
<h3>#timeSlot</h3>
}
}
Could you put the single call in your model:
workshops workshop = registerDB.Workshops.Single(w => w.WorkshopID == id);
And then in your controller set the ViewBag:
try
{
ViewBag.Enrollments = workshop.Carts.Where(x => x.Username.Equals(User.Identity.Name));
}
catch
{
ViewBag.Enrollments = "There are no results";
}