问题是我有一个表格产品,而我的更新脚本无法正常工作。一切都返回假。
产品类
@DatabaseTable(tableName = "Product")
public class Product {
@DatabaseField(index = true, generatedId = true)
private int productId;
@DatabaseField
private String name;
@DatabaseField
private int quantity;
//@DatabaseField(canBeNull = true)
//private Integer categorie;
//http://logic-explained.blogspot.com.ar/2011/12/using-ormlite-in-android-projects.html
@DatabaseField
private int categorie;
//@ForeignCollectionField
//private ForeignCollection<Categorie> itemsCategorie;
@DatabaseField
private String description;
@DatabaseField
private String photo;
Product() {
}
public Product(int productId, String name, int quantity, int categorie, String description, String photo) {
super();
this.productId = productId;
this.name = name;
this.quantity = quantity;
this.categorie = categorie;
this.description = description;
this.photo = photo;
}
public void setDescription(String description) {
this.description = description;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getAddress() {
return description;
}
public void setAddress(String address) {
this.description = address;
}
public int getProductId() {
return productId;
}
public void setProductId(int productId) {
this.productId = productId;
}
public int getQuantity() {
return quantity;
}
public void setQuantity(int quantity) {
this.quantity = quantity;
}
public int getCategorie() {
return categorie;
}
public void setCategorie(int categorie) {
this.categorie = categorie;
}
public String getPhoto() {
return photo;
}
public void setPhoto(String photo) {
this.photo = photo;
}
public CharSequence getDesc() {
return null;
}
}
我的脚本更新产品
public boolean updateProduct(Product p) {
boolean ret = false;
if (productDao != null) {
try {
productDao = getDao(Product.class);
UpdateBuilder<Product, Integer> updateBuilder = productDao
.updateBuilder();
updateBuilder.updateColumnValue("name", p.getName());
updateBuilder.updateColumnValue("quantity", p.getQuantity());
updateBuilder.updateColumnValue("categorie", p.getCategorie());
updateBuilder.updateColumnValue("description", p.getDesc());
updateBuilder.updateColumnValue("photo", p.getPhoto());
// but only update the rows where the description is some value
updateBuilder.where().eq("productId", p.getProductId());
// actually perform the update
String str = updateBuilder.prepareStatementString();
// UPDATE `Product` SET `name` = 'gcd' ,`quantity` = 1
// ,`categorie` = 1 ,`description` = ? ,`photo` = '' WHERE
// `productId` = 0
if (productDao.update(updateBuilder.prepare()) != 1) {
ret = false;
} else {
productDao.refresh(p);
ret = true;
}
} catch (Exception e) {
ret = false;
e.printStackTrace();
}
}
return ret;
}
然后我用这样的函数调用它,但总是返回 false :(
public boolean updateProduct(Product p) {
boolean ret = false;
try {
ret = getHelper().updateProduct(p);
} catch (Exception e) {
e.printStackTrace();
ret =false;
}
return ret;
}
我可以创建和删除,但我不能更新。我什么都试过了。如果您花点时间回答我的问题,我将不胜感激。