The database update command is not working for me. The database keeps the old values after an update command has been issued.
I am using SQLite in an Android Java environment. I use a helper class called Customer to populate the data items that I am going to update.
package com.cis2237.bingp4;
public class Customer {
private int id;
private String name;
private String airline;
private String status;
private int miles;
public Customer() {}
public Customer(int id, String name, String airline, String status, int miles) {
this.id = id;
this.name = name;
this.airline = airline;
this.status = status;
this.miles = miles;
}
public int getMiles() { return miles; }
public void setMiles(int miles) { this.miles = miles; }
public String getStatus() { return status; }
public void setStatus(String status) { this.status = status; }
public String getAirline() {
return airline;
}
public void setAirline(String airline) {
this.airline = airline;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
}
Here is the update statement in my database helper adapter class.
// Columns
public static final String COL_ID = "_id";
public static final String COL_NAME = "name";
public static final String COL_AIRLINE = "airline";
public static final String COL_STATUS = "status";
public static final String COL_MILES = "miles";
// Column Indexes
public static final int INDEX_ID = 0;
public static final int INDEX_NAME = INDEX_ID + 1;
public static final int INDEX_AIRLINE = INDEX_ID + 2;
public static final int INDEX_STATUS = INDEX_ID + 3;
public static final int INDEX_MILES = INDEX_ID + 4;
// Edit a customer
public void updateCustomer(Customer customer) {
ContentValues values = new ContentValues();
values.put(COL_NAME, customer.getName());
values.put(COL_AIRLINE, customer.getAirline());
values.put(COL_STATUS, customer.getStatus());
values.put(COL_MILES, customer.getMiles());
mDb.update(TABLE_NAME, values,
COL_ID + "=?", new String[]{String.valueOf(customer.getId())});
}
I simply populate the helper class with the columns properly updated using the class setters. I have debugged the database helper adapter class and everything seems to be filled in correctly with the correct updated values just before the code issues the update statement. I am not receiving any errors.
Related
please i get this errror on logcat when i use restclient to get a list. it works on desktop just after deploymnet to android
java.lang.NoSuchMethodException: ...dto.Meeting.()
its pops up more than the number of record i have in my list
WARNING: Failed to create object of type class .Meeting from the following json object {"id":1,"topic":"leksyde","description":"123e4","location":"7623","longitude":"45","latitude":"10","category":null,"datetime":"9839823"}
primary.setShowTransitionFactory(BounceInRightTransition::new);
RestClient restClient = RestClient.create()
.method("GET")
.host(LISTOFMEETINGS);
// create a custom Converter that is able to parse the response into a list of objects
InputStreamIterableInputConverter<Meeting> converter = new ItemsIterableInputConverter<>(Meeting.class);
// retrieve a list from the DataProvider
GluonObservableList<Meeting> data = DataProvider.retrieveList(restClient.createListDataReader(converter));
data.initializedProperty().addListener((obs, ov, nv) -> {
if (nv) {
for (Meeting meet: data) {
meetingslv.setItems(meet);
}
}
});
meeting.java
public class Meeting {
private IntegerProperty id = new SimpleIntegerProperty();
private StringProperty topic = new SimpleStringProperty();
private StringProperty description = new SimpleStringProperty();
private StringProperty location = new SimpleStringProperty();
private StringProperty longitude = new SimpleStringProperty();
private StringProperty latitude = new SimpleStringProperty();
private StringProperty datetime = new SimpleStringProperty();
private StringProperty category = new SimpleStringProperty();
public Meeting() {
}
public Meeting(int id, String topic, String description, String location, String longitude, String latitude, String datetime, String category) {
this.id = new SimpleIntegerProperty(id);;
this.topic = new SimpleStringProperty(topic);
this.description = new SimpleStringProperty(description);
this.location = new SimpleStringProperty(location) ;
this.longitude = new SimpleStringProperty(longitude);
this.latitude = new SimpleStringProperty(latitude);
this.datetime = new SimpleStringProperty(datetime);
this.category = new SimpleStringProperty(category);
}
public int getId() {
return id.get();
}
public IntegerProperty IdProperty() {
return id;
}
public void setId(int id) {
this.id.set(id);
}
public String getTopic() {
return topic.get();
}
public StringProperty TopicProperty() {
return topic;
}
public void setTopic(String id) {
this.topic.set(id);
}
public String getDescription() {
return description.get();
}
public StringProperty DescriptionProperty() {
return description;
}
public void setDescription(String id) {
this.description.set(id);
}
public String getLocation() {
return location.get();
}
public StringProperty LocationProperty() {
return location;
}
public void setLocation(String id) {
this.location.set(id);
}
public String getLongitude() {
return longitude.get();
}
public StringProperty LongitudeProperty() {
return longitude;
}
public void setLongitude(String id) {
this.longitude.set(id);
}
public String getLatitude() {
return latitude.get();
}
public StringProperty LatitudeProperty() {
return latitude;
}
public void setLatitude(String id) {
this.latitude.set(id);
}
public String getDatetime() {
return datetime.get();
}
public StringProperty DatetimeProperty() {
return datetime;
}
public void setDatetime(String id) {
this.datetime.set(id);
}
public String getCategory() {
return category.get();
}
public StringProperty CategoryProperty() {
return category;
}
public void setCategory(String id) {
this.category.set(id);
}
}
this is the list i am trying to parse to the listview [enter link description here]1
I am trying to implement a star rating system using Firebase realtime database and I get the following error:
No setter/field for rating found on class com.andrea.uncut.ui.Model.Post
I know this can happen when variables are not named the same as in the database but in this case they are:
public class Post {
private String postID;
private String postImage;
private float rating;
private String title;
private String description;
private String publisher;
public Post(String postID, String postImage, float rating, String title, String description, String publisher) {
this.postID = postID;
this.postImage = postImage;
this.rating = rating;
this.title = title;
this.description = description;
this.publisher = publisher;
}
public Post() {
}
public String getPostid() {
return postID;
}
public void setPostid(String postID) {
this.postID = postID;
}
public String getPostImage() {
return postImage;
}
public void setPostImage(String postImage) {
this.postImage = postImage;
}
public float getRatingScore() { return rating; }
public void setRatingScore(float rating) {
this.rating = rating;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getPublisher() {
return publisher;
}
public void setPublisher(String publisher) {
this.publisher = publisher;
}
}
All the other variables work fine so could it be anything related to the type being float?
getRatingScore and setRatingScore would be used for a property called ratingScore.
Your property is called rating, so it would need to be getRating and setRating.
The private internal properties have nothing to do with how Firebase sees them when setting data on the model class.
Plus, postID should be getPostID and setPostID for consistency.
I implemented an upload image in a fragment. I have a model named Beach.java. However, I'm encountering an error
Cannot resolve constructor 'Beach(java.lang.string,
java.lang.string)' on newBeach = new
Beach(beach_name.getText().toString(), uri.toString());
Here is the code in HomeFragment:
imageFolder.putFile(saveUri)
.addOnSuccessListener(new OnSuccessListener<UploadTask.TaskSnapshot>() {
#Override
public void onSuccess(UploadTask.TaskSnapshot taskSnapshot) {
mDialog.dismiss();
Toast.makeText(getActivity(), "Uploaded", Toast.LENGTH_SHORT).show();
imageFolder.getDownloadUrl().addOnSuccessListener(new OnSuccessListener<Uri>() {
#Override
public void onSuccess(Uri uri) {
newBeach = new Beach(beach_name.getText().toString(), uri.toString());
}
});
}
})
Here is the code in Beach.class:
public class Beach {
private String name, image, description, price, menuID;
public Beach() {
}
public Beach(String name, String image, String description, String price, String menuID) {
this.name = name;
this.image = image;
this.description = description;
this.price = price;
this.menuID = menuID;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getImage() {
return image;
}
public void setImage(String image) {
this.image = image;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getPrice() {
return price;
}
public void setPrice(String price) {
this.price = price;
}
public String getMenuID() {
return menuID;
}
public void setMenuID(String menuID) {
this.menuID = menuID;
}
}
Your Beach class defines 2 constructors, one with no parameters :
public Beach()
and one with 5 Strings :
public Beach(String name, String image, String description, String price, String menuID)
And you try to call a constructor with 2 Strings, which is no where to be found :
new Beach(beach_name.getText().toString(), uri.toString());
So you should add the below constructor to you Beach class :
public Beach(String name, String image) {
this.name = name;
this.image = image;
}
You don't have constructor with 2 parameters of String.
You can initialize class Beach with :
new Beach(name, image, description, price, menuID)
or with
new Beach()
If you want create with only 2 string add another constructor:
public Beach(String name, String image){....}
Hey guys i have stuck in the hibernate Relation with spring MVC , I have class like Student and this class is having the OneToOne relation with the Parent class ,My Error is When i tried to delete Student Object the parent Object Doesn't allow to delete the Student Object
It is giving an error like
Hibernate: delete from Student where id=?
WARN : org.hibernate.engine.jdbc.spi.SqlExceptionHelper - SQL Error: 1451, SQLState: 23000
ERROR: org.hibernate.engine.jdbc.spi.SqlExceptionHelper - Cannot delete or update a parent row: a foreign key constraint fails (`digischool`.`parent`, CONSTRAINT `FK_l65r4icaxmteeq1tg96t6n3ol` FOREIGN KEY (`student_id`) REFERENCES `student` (`id`))
"
i have Student Model Class like
#Entity
public class Student implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
private long id;
private String name;
private Parent parent;
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
#OneToOne(mappedBy="student",fetch=FetchType.EAGER)
public Parent getParent() {
return parent;
}
public void setParent(Parent parent) {
this.parent = parent;
}
}
Parent model class like
#Entity
public class Parent {
private long id;
private String name;
private String phoneNumber;
private String email;
private String relation;
private Student student;
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPhoneNumber() {
return phoneNumber;
}
public void setPhoneNumber(String phoneNumber) {
this.phoneNumber = phoneNumber;
}
#OneToOne(fetch=FetchType.EAGER)
#JoinColumn(name="student_id")
public Student getStudent() {
return student;
}
public void setStudent(Student student) {
this.student = student;
}
public String getRelation() {
return relation;
}
public void setRelation(String relation) {
this.relation = relation;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
}
In order to delete Student Object i have written DAO like
public boolean deleteStudent(long studentId) {
if(studentId > 0){
Session session = getSessionFactory().getCurrentSession();
Query query = session.createQuery("DELETE FROM Student S WHERE S.id = :studentId");
query.setParameter("studentId", studentId);
int rowChanged = query.executeUpdate();
if(rowChanged > 0){
return true;
}
}
return false;
}
My db is looks like
Please help me out i am new bee to this Spring World
This is because you are forgeting to remove the relationship from the parent entity prior to deleting the student.
the way to do this:
public boolean deleteStudent(long studentId) {
if(studentId > 0){
// get parent object
parent.setStudent(null); // THIS REMOVES THE RELATIONSHIP FROM PARENT CLASS SINCE ITS STORED THERE
// save parent object with emptied student field
Session session = getSessionFactory().getCurrentSession();
Query query = session.createQuery("DELETE FROM Student S WHERE S.id = :studentId");
query.setParameter("studentId", studentId);
int rowChanged = query.executeUpdate();
if(rowChanged > 0){
return true;
}
}
return false;
}
FYI
use the hibernates own functions when you can.
check out this link for some ways to delete a object http://www.codejava.net/frameworks/hibernate/hibernate-basics-3-ways-to-delete-an-entity-from-the-datastore
You can use attribute orphanRemoval = true with annotation #OneToOne with your Parent entity
#OneToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY, orphanRemoval = true)
public Student getStudent() {
return student;
}
....
hope it help.
i am new for Spring MVC. In my small crm project, i want to display a objectList with nested object. But it show only a object inside objectname like de.fischerlandmaschinen.crm.model.Employee#6018ebcc statt the converted name string.
the below are the codes:
Domain:
#Entity
#Table(name = "CUSTOMER")
public class Customer implements Serializable {
private static final long serialVersionUID = 5015685214532097319L;
private Long id;
private String foreignId;
private String title;
private String firstName;
private String middleName;
#NotEmpty
private String lastName;
#Enumerated(EnumType.STRING)
private Gender gender;
#Past
#Temporal(TemporalType.DATE)
private Date dateOfBirth;
#Valid
private Address address = new Address();
#Valid
private Contact contact = new Contact();
private Company company = null; // new Company();
private String notice;
#Past
#Temporal(TemporalType.DATE)
private Date createdDate;
#Past
#Version
#Temporal(TemporalType.DATE)
private Date lastUpdatedDate;
private String status;
private Employee primaryConsultant = null; //new Employee();
private Employee secondaryConsultant = null; //new Employee();
public Customer(){
createdDate = new Date();
lastUpdatedDate = new Date();
}
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
#Column(name = "customer_id")
public Long getId() {
return id;
}
public void setId(Long customerId) {
this.id = customerId;
}
#Column(name = "foreign_id")
public String getForeignId() {
return foreignId;
}
public void setForeignId(String foreignId) {
this.foreignId = foreignId;
}
#OneToOne(cascade = CascadeType.ALL)
public Address getAddress() {
return address;
}
public void setAddress(Address address) {
this.address = address;
}
#OneToOne(cascade = CascadeType.ALL)
public Contact getContact() {
return contact;
}
public void setContact(Contact contact) {
this.contact = contact;
}
#Column(name = "created_date")
public Date getCreatedDate() {
return createdDate;
}
public void setCreatedDate(Date createdDate) {
this.createdDate = createdDate;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getMiddleName() {
return middleName;
}
public void setMiddleName(String middleName) {
this.middleName = middleName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public Gender getGender() {
return gender;
}
public void setGender(Gender gender) {
this.gender = gender;
}
#Column(name = "date_of_birth")
public Date getDateOfBirth() {
return dateOfBirth;
}
public void setDateOfBirth(Date dateOfBirth) {
this.dateOfBirth = dateOfBirth;
}
#ManyToOne(fetch=FetchType.LAZY, cascade = { CascadeType.MERGE, CascadeType.PERSIST, CascadeType.REFRESH })
#JoinColumn(name="company", nullable=true)
public Company getCompany() {
return company;
}
public void setCompany(Company company) {
this.company = company;
}
public String getNotice() {
return notice;
}
public void setNotice(String notice) {
this.notice = notice;
}
#Column(name = "last_updated_date")
public Date getLastUpdatedDate() {
return lastUpdatedDate;
}
public void setLastUpdatedDate(Date lastUpdatedDate) {
this.lastUpdatedDate = lastUpdatedDate;
}
// #ManyToOne(fetch=FetchType.LAZY, cascade = { CascadeType.MERGE, CascadeType.PERSIST, CascadeType.REFRESH })
#ManyToOne(fetch=FetchType.EAGER)
#JoinColumn(name="primary_consultant", nullable=true)
public Employee getPrimaryConsultant() {
return primaryConsultant;
}
public void setPrimaryConsultant(Employee primaryConsultant) {
this.primaryConsultant = primaryConsultant;
}
// #ManyToOne(fetch=FetchType.LAZY, cascade = { CascadeType.MERGE, CascadeType.PERSIST, CascadeType.REFRESH })
#ManyToOne(fetch=FetchType.EAGER)
#JoinColumn(name="secondary_consultant", nullable=true)
public Employee getSecondaryConsultant() {
return secondaryConsultant;
}
public void setSecondaryConsultant(Employee secondaryConsultant) {
this.secondaryConsultant = secondaryConsultant;
}
}
and the Employee Domain:
#Entity
#Table(name = "EMPLOYEE")
public class Employee implements Serializable {
private static final long serialVersionUID = 1L;
private Long id;
private String alias;
private String title;
private String firstName;
private String middleName;
private String lastName;
// getter and setter
}
In my Controller:
#RequestMapping(value = "customer/list")
public ModelAndView list() {
ModelAndView mav = new ModelAndView("customer/list");
List<Customer> customers = customerService.getAllCustomers();
mav.addObject("customerList", customers);
return mav;
}
#InitBinder
protected void initBinder(WebDataBinder binder) {
SimpleDateFormat dateFormat = new SimpleDateFormat("dd.MM.yyyy");
dateFormat.setLenient(false);
binder.setAutoGrowNestedPaths(false);
binder.registerCustomEditor(Date.class, new CustomDateEditor(
dateFormat, true));
binder.registerCustomEditor(Gender.class, new GenderEditor());
binder.registerCustomEditor(Employee.class,
new CustomEmployeePropertyEditor(employeeService));
}
And i have a CustomEmployeePropertyEditor extends PropertyEditorSupport for initBinder:
#Override
public void setAsText(String text) {
logger.info("convert string to employee object");
if (text == null || text.length() == 0) {
setValue(null);
return;
}
Long id = (Long) typeConverter.convertIfNecessary(text, Long.class);
if (id == null) {
setValue(null);
return;
}
setValue(employeeService.getEmployee(id));
}
#Override
public String getAsText() {
logger.info("convert employee object to string");
Object obj = getValue();
if (obj == null) {
return null;
}
return (String) typeConverter.convertIfNecessary(
((Employee) obj).getLastName(), String.class);
}
#Override
public void setAsText(String text) {
logger.info("convert string to employee object");
if (text == null || text.length() == 0) {
setValue(null);
return;
}
Long id = (Long) typeConverter.convertIfNecessary(text, Long.class);
if (id == null) {
setValue(null);
return;
}
setValue(employeeService.getEmployee(id));
}
#Override
public String getAsText() {
logger.info("convert employee object to string");
Object obj = getValue();
if (obj == null) {
return null;
}
return (String) typeConverter.convertIfNecessary(
((Employee) obj).getLastName(), String.class);
}
And die JSP Code:
<c:forEach items="${customerList}" var="customer">
<tr>
<td>${customer.id}</td>
...
<td>${customer.primaryConsultant}</td>
<td>${customer.secondaryConsultant}</td>
...
</tr>
</c:forEach>
But i get the unwanted result in Browser:
de.fischerlandmaschinen.crm.model.Employee#6018ebcc
in the field primaryConsultant and secondaryConsultant fields
What is the wrong. And i look for the document of registerCustomEditor. it saids, that it can for the nested path property too. What means the path property? The path in .jsp page or the property in domain object?
thanks
Ludwig
Override toString() method in Employee class and write what field values you want to display in the browser. That is the easy way and the only way I can think of right now. :)