Develop Reference

JSON parse error: Cannot deserialize instance of.. out of START_ARRAY token

I know there are a few questions on stackoverflow regarding this problem. But I have have been spending hours trying to resolve this error without any success.
I am using the mysql database to store the values.
I keep on getting the error message from the
com.example.springboot.Recipe file.
This is springboot recipe file
package com.example.springboot;
import com.example.springboot.Recipe;
import javax.persistence.*;
import javax.validation.constraints.NotBlank;
import javax.validation.constraints.NotNull;
#Entity // This tells Hibernate to make a table out of this class
public class Recipe {
public Recipe(){
}
public Recipe(Integer id, String name, String description, String type, Integer preptime, Integer cooktime, String content, Integer difficulty){
this.id = id;
this.name = name;
this.description = description;
this.type = type;
this.preptime = preptimee;
this.cooktime = cooktime;
this.content = content;
this.difficulty = difficulty;
}
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
private Integer id;
private String name;
private String description;
private String type;
private Integer preptime;
private Integer cooktime;
#Column(columnDefinition = "TEXT")
private String content;
private Integer difficulty;
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
public String getTitle() {
return name;
}
public void setTitle(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getContent() {
return content;
}
public void setContent(String content) {
this.content = content;
}
public Integer getDifficulty() {
return difficulty;
}
public void setDifficulty(Integer difficulty) {
this.difficulty = difficulty;
}
public Integer getCookingtime() {
return cooktime;
}
public void setCookingtimeime(Integer cooktime) {
this.cooktime = cooktime;
}
public Integer getPreparationtime() {
return preptime;
}
public void setPreparationtime(Integer preptime) {
this.preptime = preptime;
}
}
Main Controller:
#PutMapping("/recipes/edit/{id}")
void updateRecipe2(#PathVariable int id, #RequestBody Recipe recipe ) {
Recipe recipe_ = recipeRepository.findById(id).get();
recipe_.setTitle(recipe.getTitle());
System.out.println("sss " + recipe.getname());
System.out.println("change");
recipeRepository.save(recipe_);
}
service.ts:
updateRecipe2 (id: number, recipe: any): Observable<any > {
const url = `${this.usersUrl}/edit/${id}`;
return this.http.put(url ,recipe);
}
where the updateRecipe2 gets called:
save(): void {
const id = +this.route.snapshot.paramMap.get('name');
this.recipeService.updateRecipe2(id, this.recipes)
.subscribe(() => this.gotoUserList());
}
as soon as the user clicks save this functions saves the changes made.
I hope the code snippets that I provided are enough to help solve the problem.
Thank you in advance.
I am building a rest api with spring boot and I am using angularjs as it's frontend. I am pretty new to web-development.

You are sending a list of recipes to an api endpoint that expects a single recipe object.
Your options are:
Send only one recipe object at a time, for example:
this.recipeService.updateRecipe2(id, this.recipes[0])
OR: create a new API endpoint to accept a list of recipes, to edit them in "batch"
#PutMapping("/recipes/edit")
void updateRecipes(#RequestBody List<Recipe> recipe ) {

my Example:
Use:
#PostMapping
Code:
public void setTransacciones(List<Transacciones> transacciones) {
this.transacciones = transacciones;
}
CodeBean:
public class Transacciones {
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
private String text;
}
Post(raw):
{
"transacciones" : [ {"text" : "1"}, {"text" : "2"} ]
}
Result:
{
"transacciones": [
{
"transaccionId": 2,
"text": "1"
},
{
"transaccionId": 3,
"text": "2"
}
]
}
BINGO!!

Get value from java lang object on hibernate

I have query:
public List<InvoiceItems> findAllBalance(String external_key) throws HibernateException {
return (List<InvoiceItems>) session.createQuery("select SUM(i.amount) as amount, t.record_id from Accounts a, InvoiceItems i, Tenant t WHERE a.record_id = i.account_record_id AND t.record_id=a.tenant_record_id AND a.external_key='"+external_key+"' group by i.tenant_record_id, t.record_id").list();
}
InvoiceItems.java:
package id.co.keriss.consolidate.ee;
import java.util.Date;
import org.jpos.ee.Accounts;
public class InvoiceItems {
private long record_id;
private String id;
private String type;
private String invoice_id;
private Accounts account_record_id;
private Tenant tenant_record_id;
private String description;
private long amount;
private Date created_date;
private String usage_name;
private String plan_name;
private String account_id;
public String getAccount_id() {
return account_id;
}
public void setAccount_id(String account_id) {
this.account_id = account_id;
}
public long getRecord_id() {
return record_id;
}
public void setRecord_id(long record_id) {
this.record_id = record_id;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public String getInvoice_id() {
return invoice_id;
}
public void setInvoice_id(String invoice_id) {
this.invoice_id = invoice_id;
}
public Accounts getAccount_record_id() {
return account_record_id;
}
public void setAccount_record_id(Accounts account_record_id) {
this.account_record_id = account_record_id;
}
public Tenant getTenant_record_id() {
return tenant_record_id;
}
public void setTenant_record_id(Tenant tenant_record_id) {
this.tenant_record_id = tenant_record_id;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public long getAmount() {
return amount;
}
public void setAmount(long amount) {
this.amount = amount;
}
public Date getCreated_date() {
return created_date;
}
public void setCreated_date(Date created_date) {
this.created_date = created_date;
}
public String getUsage_name() {
return usage_name;
}
public void setUsage_name(String usage_name) {
this.usage_name = usage_name;
}
public String getPlan_name() {
return plan_name;
}
public void setPlan_name(String plan_name) {
this.plan_name = plan_name;
}
}
then set to an variable:
List<InvoiceItems> invoiceItems = invoiceItemsDao.findAllBalance(jsonRecv.getString("externalkey"));
I want to get the value from that query, what I try:
LogSystem.info(request, "List : " + invoiceItems.get(0).getId();
I got an error "can't cast to InvoiceItems"
then I try changing from List<InvoiceItems> to just List
get with this :
LogSystem.info(request, "List : " + invoiceItems.get(0);
but the output like this not the value:
[Ljava.lang.Object;#41ea9df8
any advice? final result what i want is calculate amount of tenant

session.createQuery take HQL (Hibernate query language) however I see you use native SQL. Try using createSQLQuery method.
public List<InvoiceItems> findAllBalance(String external_key) throws HibernateException {
Query query = session.createSQLQuery("select SUM(i.amount) as amount, t.record_id from Accounts a, InvoiceItems i, Tenant t WHERE a.record_id = i.account_record_id AND t.record_id=a.tenant_record_id AND a.external_key='"+external_key+"' group by i.tenant_record_id, t.record_id");
query.setResultTransformer(Transformers.aliasToBean(InvoiceItems.class));
List<InvoiceItems> list = query.list();
return list;
}

show all list query java hibernate

i have this function to query in hibernate:
public List<TransactionQR> getAllTransaction() throws HibernateException {
return this.session.createQuery("SELECT id FROM TransactionQR").list();
}
then is success to show the data like this in html:
[2, 3]
but when i add more column in SELECT like this:
public List<TransactionQR> getAllTransaction() throws HibernateException {
return this.session.createQuery("SELECT id, codeqr FROM TransactionQR").list();
}
the result show like this:
[Ljava.lang.Object;#25026824, [Ljava.lang.Object;#170b75f9]
what is Ljava.lang.Object;#25026824 ? is return object, can i handle it to convert from list to json ?
i have model TransactionQR.java :
public class TransactionQR implements Serializable {
private Long id;
private String codeqr;
private Date approvaltime;
private String merchant;
private String code_merchant;
private Long amount;
private Long saldoawal;
private Integer tracenumber;
private String state;
private Date createdate;
private Batch batch;
public TransactionQR() {
}
public TransactionQR(Long id, String codeqr, Date approvaltime, String merchant, String code_merchant, Long amount,
Long saldoawal, Integer tracenumber, String state, Date createdate, Batch batch) {
super();
this.id = id;
this.codeqr = codeqr;
this.approvaltime = approvaltime;
this.merchant = merchant;
this.code_merchant = code_merchant;
this.amount = amount;
this.saldoawal = saldoawal;
this.tracenumber = tracenumber;
this.state = state;
this.createdate = createdate;
this.batch = batch;
}
public Long getId() {
return id;
}
public Date getApprovalTime() {
return approvaltime;
}
public Batch getBatch() {
return batch;
}
public void setBatch(Batch batch) {
this.batch = batch;
}
public void setApprovalTime(Date approvalTime) {
this.approvaltime = approvalTime;
}
public void setId(Long id) {
this.id = id;
}
public Date getApprovaltime() {
return approvaltime;
}
public void setApprovaltime(Date approvaltime) {
this.approvaltime = approvaltime;
}
public String getCodeqr() {
return codeqr;
}
public void setCodeqr(String codeqr) {
this.codeqr = codeqr;
}
public String getMerchant() {
return merchant;
}
public void setMerchant(String merchant) {
this.merchant = merchant;
}
public String getCode_merchant() {
return code_merchant;
}
public void setCode_merchant(String code_merchant) {
this.code_merchant = code_merchant;
}
public Long getAmount() {
return amount;
}
public void setAmount(Long amount) {
this.amount = amount;
}
public Long getSaldoawal() {
return saldoawal;
}
public void setSaldoawal(Long saldoawal) {
this.saldoawal = saldoawal;
}
public Integer getTracenumber() {
return tracenumber;
}
public void setTracenumber(Integer tracenumber) {
this.tracenumber = tracenumber;
}
public String getState() {
return state;
}
public void setState(String state) {
this.state = state;
}
public Date getCreatedate() {
return createdate;
}
public void setCreatedate(Date createdate) {
this.createdate = createdate;
}
}
the result is i want to show all data from database in list

In second case, since you are selecting two attributes, that is why session.createQuery("").list returns a list of object array(List<Object[]>) . At each index of list you will find an object array. Each array will have two indexes. First index will provide id while the second one would provide codeqr. So, basically you need to iterate over the list. Then fetch each value individually like arr[0], arr[1]..

spring data serialization with relational tables

Problem: After a long research how I can serialize data from a database with two tables I have found that tutorial. But I need to get the data out of the database and I do not know how to get connect the data to the database.
I have found only non-relational samples with one table.
Question: Does someone have a sample for the DAO class to get the data for the characteristics out of the database?
JSON structure needed:
[
{
"id":1,
"name":"CNC",
"beschreibung":"Metallverarbeitung",
"characteristics":[
"id_characteristic":1,
"id_maschine":2,
"name":"size",
"description":"length of maschine",
"type":1
]
}
]
current JSON structure:
[
{
"id":1,
"name":"CNC",
"beschreibung":"Metallverarbeitung",
"characteristics":[
]
},
...
]
DAO method (until now, does not fill the characteristics Array):
#Override
public List<Maschine> list() {
String selectMaschines = "SELECT * FROM maschine";
List<Maschine> listMaschine = jdbcTemplate.query(selectMaschines, new RowMapper<Maschine>() {
#Override
public Maschine mapRow(ResultSet rs, int rowNum) throws SQLException {
Maschine aMaschine = new Maschine();
aMaschine.setId(rs.getInt("Maschine_id"));
aMaschine.setName(rs.getString("name"));
aMaschine.setBeschreibung(rs.getString("beschreibung"));
return aMaschine;
}
});
return listMaschine;
}
Table structure:
Maschine table:
maschine_id || name || description
Characteristic table:
id_characteristic || id_maschine || name || description || type

If you want to work with spring data you have to add spring data dependency to your pom.xml
then add the annotation for your entities :
#Entity
public class Maschine implements Serializable {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private int maschine_id ;
private String name ;
private String description ;
#OneToMany(mappedBy="maschine")
private Collection<Characteristic> characteristics;
public Maschine() {
super();
// TODO Auto-generated constructor stub
}
public int getMaschine_id() {
return maschine_id;
}
public void setMaschine_id(int maschine_id) {
this.maschine_id = maschine_id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
// Characteristic entity
#Entity
public class Characteristic implements Serializable {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private int id_characteristic ;
private String name;
private String description;
private String type ;
#ManyToOne
#JoinColumn(name="id_machine")
private Maschine maschine;
public int getId_characteristic() {
return id_characteristic;
}
public void setId_characteristic(int id_characteristic) {
this.id_characteristic = id_characteristic;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public String getType() {
return type;
}
public void setType(String type) {
this.type = type;
}
public Maschine getMaschine() {
return maschine;
}
public void setMaschine(Maschine maschine) {
this.maschine = maschine;
}
public Characteristic() {
super();
// TODO Auto-generated constructor stub
}
}
And in your DAO package you have to create a interface that extends JPARepository for exemple :
public interface MaschineRepository extends JpaRepository<Maschine,Integer> {
}
then when you call MaschineRepository.findAll() you will get all the maschines with their Characteristics
Spring data dependency
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
don't forget to add the database configuration in your application.properties if you work with spring boot

How to write query in hibernate(HQL) to perform 2 joins without mapping?

I want to convert the following query into HQL:
SELECT C.ID, E.DESCRIPTION as STATUS, E1.DESCRIPTION as SUBJECT
FROM CRED C
join CODE_EVN E
ON E.CODE = C.STATUS_CODE
AND E.SUBCODE = C.STATUS_SUBCODE
join CODE_EVN E1
ON E1.CODE = C.SUBJECT_CODE
AND E1.SUBCODE = C.SUBJECT_SUBCODE
I have two classes User and Codes with no mapping in between them, so how do I execute the following query in Hibernate?
I have tried out many things but nothing seems to work
These are my 2 bean classes:
User class:
#Entity
#Table(name="CRED")
public class User {
private String id;
private String STATUS_CODE;
private String STATUS_SUBCODE;
private String SUBJECT_CODE;
private String SUBJECT_SUBCODE;
#Id
#Column(name="ID")
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public void setSTATUS_CODE(String sTATUS_CODE) {
STATUS_CODE = sTATUS_CODE;
}
public String getSTATUS_CODE() {
return STATUS_CODE;
}
public void setSTATUS_SUBCODE(String sTATUS_SUBCODE) {
STATUS_SUBCODE = sTATUS_SUBCODE;
}
public String getSTATUS_SUBCODE() {
return STATUS_SUBCODE;
}
public void setSUBJECT_CODE(String sUBJECT_CODE) {
SUBJECT_CODE = sUBJECT_CODE;
}
public String getSUBJECT_CODE() {
return SUBJECT_CODE;
}
public void setSUBJECT_SUBCODE(String sUBJECT_SUBCODE) {
SUBJECT_SUBCODE = sUBJECT_SUBCODE;
}
public String getSUBJECT_SUBCODE() {
return SUBJECT_SUBCODE;
}
}
Codes class:
#Entity
#Table(name="CODE_EVN")
public class Codes {
#Id
private String CODE;
private String SUBCODE;
private String DESCRIPTION;
public void setCODE(String cODE) {
CODE = cODE;
}
public String getCODE() {
return CODE;
}
public void setSUBCODE(String sUBCODE) {
SUBCODE = sUBCODE;
}
public String getSUBCODE() {
return SUBCODE;
}
public void setDESCRIPTION(String dESCRIPTION) {
DESCRIPTION = dESCRIPTION;
}
public String getDESCRIPTION() {
return DESCRIPTION;
}
}