EL1008E: Property or field 'isAvailable' cannot be found on object of type 'com.inventory.domain.Item' - maybe not public or not valid? - spring-boot

Question

I have one boolean field in item bean all other fields are populating but only isAvailable is not populating in ui using thymeleaf I am getting error as property can't not found I am not getting the root cause
Is there any specific way to read the boolean field in thymeleaf. because in .html page when i tried to read boolean value st.isAvailable its throwing error in backend property not found hence not populating value
Item Bean
package com.inventory.domain;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import java.util.SortedSet;
import java.util.TreeSet;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.EnumType;
import javax.persistence.Enumerated;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.Lob;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.OrderBy;
import javax.persistence.Table;
#Entity
#Table(name = "item")
public class Item {
#Id
#GeneratedValue(strategy = GenerationType.AUTO)
private int item_id;
#ManyToOne
#JoinColumn(name = "category_id")
private Category categoryId;
#Column(name = "item_name",unique = true)
private String itemName;
#Column(name = "current_stock_quantity")
private double currentStockQuantity;
public double getCurrentStockQuantity() {
return currentStockQuantity;
}
#Column(name = "unit")
#Enumerated(EnumType.STRING)
private ItemWeightUnit unit;
#Column(name = "current_purchase_price")
private double currentPurchasePrice;
#Column(name = "is_available")
private boolean isAvailable;
#Column(name = "is_active")
private boolean isActive;
#Column(name = "item_description")
#Lob
private String itemDescription;
#OneToMany(mappedBy = "item",cascade = CascadeType.ALL)
private List<Vendor> vendor = new ArrayList<Vendor>();
#OneToMany(mappedBy = "item",cascade = CascadeType.ALL)
#OrderBy("transaction_date ASC")
private SortedSet<ItemTransaction> itemTransaction=new TreeSet<ItemTransaction>();
#OneToMany(mappedBy = "item",cascade = CascadeType.ALL)
#OrderBy("date ASC")
private SortedSet<PricingHistory> priceHistory=new TreeSet<PricingHistory>();
public SortedSet<ItemTransaction> getItemTransaction() {
return itemTransaction;
}
public void setItemTransaction(SortedSet<ItemTransaction> itemTransaction) {
this.itemTransaction = itemTransaction;
}
public void setCurrentStockQuantity(double currentStockQuantity) {
this.currentStockQuantity = currentStockQuantity;
}
public List<Vendor> getVendor() {
return vendor;
}
public void setVendor(List<Vendor> vendor) {
this.vendor = vendor;
}
public int getItem_id() {
return item_id;
}
public void setItem_id(int item_id) {
this.item_id = item_id;
}
public Category getCategoryId() {
return categoryId;
}
public void setCategoryId(Category categoryId) {
this.categoryId = categoryId;
}
public String getItemName() {
return itemName;
}
public void setItemName(String itemName) {
this.itemName = itemName;
}
public String getItemDescription() {
return itemDescription;
}
public void setItemDescription(String itemDescription) {
this.itemDescription = itemDescription;
}
public boolean isAvailable() {
return isAvailable;
}
public void setAvailable(boolean isAvailable) {
this.isAvailable = isAvailable;
}
public boolean isActive() {
return isActive;
}
public void setActive(boolean isActive) {
this.isActive = isActive;
}
public ItemWeightUnit getUnit() {
return unit;
}
public void setUnit(ItemWeightUnit unit) {
this.unit = unit;
}
public double getCurrentPurchasePrice() {
return currentPurchasePrice;
}
public void setCurrentPurchasePrice(double currentPurchasePrice) {
this.currentPurchasePrice = currentPurchasePrice;
}
public SortedSet<PricingHistory> getPriceHistory() {
return priceHistory;
}
public void setPriceHistory(SortedSet<PricingHistory> priceHistory) {
this.priceHistory = priceHistory;
}
}
<tbody>
<tr th:each="st,iter : ${items}">
<td th:text="${iter.count}"></td>
<td th:text="${st.itemName}"></td>
<td th:text="${st.currentStockQuantity}"></td>
<td th:text="${st.unit}"></td>
<td th:text="${st.currentPurchasePrice}"></td>
<div th:if="${st.isAvailable} == true">
<td>Yes</td>
</div>
<div th:unless="${st.isAvailable} == false">
<td>No</td>
</div>
<td>
<a href="#" class="btn btn-default" th:href="#{/karyawan/form(id=${st.id})}"
title="Edit Data"><span class="glyphicon glyphicon-edit"></span></a>
<a href="#" class="btn btn-default" th:href="#{/karyawan/delete(id=${st.id})}"
title="Delete Data"><span class="glyphicon glyphicon-trash"></span></a>
</td>
</tr>
<tr th:if="${#lists.isEmpty(items.content)}">
<td colspan="13" class="text-center">Data Not Found</td>
</tr>
</tbody>

Answer 1

Getter and Setter for isAvailable method is not correct, when deserializing and serializing then you need to update them.
public boolean getIsAvailable() {
return isAvailable;
}
public void setIsAvailable(boolean isAvailable) {
this.isAvailable = isAvailable;
}