I'm trying to convert a "flat" query into a complex object. The query returns custom_height and custom_width which I would like to be a child object off of the main Panel object being serialized. When I attempt to use splitOn to achieve this, I am getting a null ref exception from dapper but I'm not sure why.
My code looks like this
const string panelsSql = #"
SELECT p.panel_id, p.board_id, p.type_id, p.size_id, p.created_on, p.updated_on, p.custom_height, p.custom_width
FROM CAT.panels p
JOIN CAT.boards b ON b.board_id = p.board_id
WHERE p.board_id = #boardId
AND b.user_id = #userId;";
return await conn.Connection.QueryAsync<Panel, int, int, Panel>(
panelsSql,
(panel, width, height) => {
panel.CustomSize = new Common.Objects.CustomPanelSize { Width = width, Height = height };
return panel;
},
p,
splitOn: "custom_height, custom_width").ConfigureAwait(false);
The exception I'm getting is
System.NullReferenceException: Object reference not set to an instance of an object.
at Dapper.SqlMapper.<>c__DisplayClass158_0`8.<GenerateMapper>b__1(IDataReader r) in C:\projects\dapper\Dapper\SqlMapper.cs:line 1542
at Dapper.SqlMapper.MultiMapImpl[TFirst,TSecond,TThird,TFourth,TFifth,TSixth,TSeventh,TReturn](IDbConnection cnn, CommandDefinition command, Delegate map, String splitOn, IDataReader reader, Identity identity, Boolean finalize)+MoveNext() in C:\projects\dapper\Dapper\SqlMapper.cs:line 1442
at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
at Dapper.SqlMapper.MultiMapAsync[TFirst,TSecond,TThird,TFourth,TFifth,TSixth,TSeventh,TReturn](IDbConnection cnn, CommandDefinition command, Delegate map, String splitOn) in C:\projects\dapper\Dapper\SqlMapper.Async.cs:line 949
at Thing.Common.Data.DbBase.GetBoardPanelsAsync(CgyDbType dbType, CurrentConfigs configs, Int32 userId, UInt32 boardId, Int32 maxRetries, Int32 retryDelay) in /Users/joephillips/repos/dotnet_e/Thing.Common.Data/DbBase.cs:line 6187
I don't know why you get the exception, but I would do like this:
const string panelsSql = #"
SELECT p.panel_id, p.board_id, p.type_id, p.size_id, p.created_on, p.updated_on, p.custom_height AS Height, p.custom_width AS Width
FROM CAT.panels p
JOIN CAT.boards b ON b.board_id = p.board_id
WHERE p.board_id = #boardId
AND b.user_id = #userId;";
return await conn.Connection.QueryAsync<Panel, Common.Objects.CustomPanelSize, Panel>(
panelsSql,
(panel, size) => {
panel.CustomSize = size;
return panel;
},
p,
splitOn: "Width").ConfigureAwait(false);
I changed the SQL to return column names that are easier to map and simplified it to only two objects being returned. This requires CustomPanelSize to have a parameterless constructor.
Related
Using the example code below as context... When I run this query I get the 'Id' field coming back as default value (which is 0 for an int). I would like to tell dapper to run in a manner where it would throw an exception if there is a column in the result set that does not get mapped to a property on my result object. (I understand that the issue is just that I need to remove the extra 'd' in the SQL query but I'm interested in having this expose itself more explicitly)
I've been unable to find anything on this topic. Please let me know if this is even possible with Dapper.
Thanks in advance (besides this issue, and for anyone who hasn't taken the plunge, Dapper really is the greatest thing since sliced bread!).
class CustomerRecord
{
public int Id { get; set; }
public string Name { get; set; }
}
CustomerRecord[] GetCustomerRecords()
{
CustomerRecord[] ret;
var sql = #"SELECT
CustomerRecordId AS Idd,
CustomerName as Name
FROM CustomerRecord";
using (var connection = new SqlConnection(this.connectionString))
{
ret = connection.Query<CustomerRecord>(sql).ToArray();
}
return ret;
}
You could create your own type map where you use Dapper's DefaultTypeMap and throw an exception when it cannot find the member:
public class ThrowWhenNullTypeMap<T> : SqlMapper.ITypeMap
{
private readonly SqlMapper.ITypeMap _defaultTypeMap = new DefaultTypeMap(typeof(T));
public ConstructorInfo FindConstructor(string[] names, Type[] types)
{
return _defaultTypeMap.FindConstructor(names, types);
}
public ConstructorInfo FindExplicitConstructor()
{
return _defaultTypeMap.FindExplicitConstructor();
}
public SqlMapper.IMemberMap GetConstructorParameter(ConstructorInfo constructor, string columnName)
{
return _defaultTypeMap.GetConstructorParameter(constructor, columnName);
}
public SqlMapper.IMemberMap GetMember(string columnName)
{
var member = _defaultTypeMap.GetMember(columnName);
if (member == null)
{
throw new Exception();
}
return member;
}
}
Downside of this, is that you have to configure all the type maps for every entity:
SqlMapper.SetTypeMap(typeof(CustomerRecord), typeof(ThrowWhenNullTypeMap<CustomerRecord>));
This could be configured using reflection, however.
I came here after I solved this same problem for the IEnumerable<dynamic> methods in Dapper. Then I found the proposal to solve the issue for Query<T>; but that doesn't seem to be going anywhere.
My answer builds on the answer proposed by #HenkMollema, and uses his class in the solution, so credit to him for that...
To solve the IEnumerable<dynamic> scenario, I had created a "SafeDynamic" class (follow the link above to see that). I refactored the static "Create" method into an extension method:
public static class EnumerableDynamicExtensions
{
public static IEnumerable<dynamic> Safe(this IEnumerable<dynamic> rows)
{
return rows.Select(x => new SafeDynamic(x));
}
}
and then I created a DapperExtensions class to provide 'Safe' versions of Query and Read (Read is used after QueryMultiple), to give me...
internal static class DapperExtensions
{
public static IEnumerable<dynamic> SafeQuery(this IDbConnection cnn, string sql, object param = null, IDbTransaction transaction = null, bool buffered = true, int? commandTimeout = default(int?), CommandType? commandType = default(CommandType?))
{
return cnn.Query(sql, param, transaction, buffered, commandTimeout, commandType).Safe();
}
public static IEnumerable<dynamic> SafeRead(this SqlMapper.GridReader gridReader, bool buffered = true)
{
return gridReader.Read(buffered).Safe();
}
}
So to solve this issue I added a "SafeQuery<T>" method to DapperExtensions, which takes care of setting up that type mapping for you:
private static readonly IDictionary<Type, object> TypesThatHaveMapper = new Dictionary<Type, object>();
public static IEnumerable<T> SafeQuery<T>(this IDbConnection cnn, string sql, object param = null, IDbTransaction transaction = null, bool buffered = true, int? commandTimeout = default(int?), CommandType? commandType = default(CommandType?))
{
if (TypesThatHaveMapper.ContainsKey(typeof(T)) == false)
{
SqlMapper.SetTypeMap(typeof(T), new ThrowWhenNullTypeMap<T>());
TypesThatHaveMapper.Add(typeof(T), null);
}
return cnn.Query<T>(sql, param, transaction, buffered, commandTimeout, commandType);
}
So if the original poster changes the call to Query to become SafeQuery, it should do what he requested
Edit 25/1/17
Improvements to avoid threading issues on the static dictionary:
private static readonly ConcurrentDictionary<Type, object> TypesThatHaveMapper = new ConcurrentDictionary<Type, object>();
public static IEnumerable<T> SafeQuery<T>(this IDbConnection cnn, string sql, object param = null, IDbTransaction transaction = null, bool buffered = true, int? commandTimeout = default(int?), CommandType? commandType = default(CommandType?))
{
TypesThatHaveMapper.AddOrUpdate(typeof(T), AddValue, UpdateValue);
return cnn.Query<T>(sql, param, transaction, buffered, commandTimeout, commandType);
}
private static object AddValue(Type type)
{
SqlMapper.SetTypeMap(type, XXX); // Apologies... XXX is left to the reader, as my implementation has moved on significantly.
return null;
}
private static object UpdateValue(Type type, object existingValue)
{
return null;
}
I'd like to expand on #Richardissimo 's answer by providing a visual studio project that includes his "SafeQuery" extention to Dapper, wrapped up nice and neat and tested.
https://github.com/LarrySmith-1437/SafeDapper
I use this in all my projects now to help keep the DAL clean of mismapped data, and felt the need to share. I would have posted up a Nuget, but the dependency on Dapper itself makes it much easier to post the project where consumers can update the reference to the Dapper version they want. Consume in good health, all.
Based on this thread and some other resources on SO, I've created an extension method without any custom mapper. What I needed was to throw when some property of my DTO was not set because for example SQL query has some column missing in SELECT statement.
This way my DTO would be set with default property silently and that's kinda dangerous.
The code can be simplified a little by not checking firstly for all properties being present in result, but throwing exception in the last Select call where we could iterate through properties of our type and check if query result has this property as well.
public static class Extensions
{
public static async Task<IEnumerable<T>> SafeQueryAsync<T>(
this IDbConnection cnn,
string sql,
object param = null,
IDbTransaction transaction = null,
int? commandTimeout = default(int?),
CommandType? commandType = default(CommandType?))
where T : new()
{
Dictionary<string, PropertyInfo> propertySetters = typeof(T)
.GetProperties().Where(p => p.CanRead && p.CanWrite)
.ToDictionary(p => p.Name.ToLowerInvariant(), p => p);
HashSet<string> typeProperties = propertySetters
.Select(p => p.Key)
.ToHashSet();
var rows = (await cnn.QueryAsync(sql, param, transaction, commandTimeout, commandType)).ToArray();
if (!rows.Any())
{
return Enumerable.Empty<T>();
}
var firstRow = rows.First();
HashSet<string> rowColumns = ((IDictionary<string, object>) firstRow)
.Select(kvp=>kvp.Key.ToLowerInvariant()).ToHashSet();
var notMappedColumns = typeProperties.Except(rowColumns).ToArray();
if (notMappedColumns.Any())
{
throw new InvalidOperationException(
$"Not all type properties had corresponding columns in SQL query. Query result lacks [{string.Join(", ", notMappedColumns)}]");
}
return rows.Select(row =>
{
IDictionary<string, object> rowDict = (IDictionary<string, object>) row;
T instance = new T();
rowDict.Where(o => propertySetters.ContainsKey(o.Key.ToLowerInvariant()))
.ToList().ForEach(o => propertySetters[o.Key.ToLowerInvariant()].SetValue(instance, o.Value));
return instance;
}).AsEnumerable();
}
}
I am using Dapper to query a table that includes an XML field:
CREATE TABLE Workflow
(
Guid uniqueidentifier not null,
State xml not null
)
which is then mapped to a property of type XDocument:
public class Workflow
{
public Guid InstanceId { get;set; }
public XDocument State { get;set; }
}
but when I try to query the table, I get the following error:
Error parsing column 1 (State= - String)
at Dapper.SqlMapper.ThrowDataException(Exception ex, Int32 index, IDataReader reader, Object value) in d:\\Dev\\dapper-dot-net\\Dapper NET40\\SqlMapper.cs:line 4045
at Deserialize038b29f4-d97d-4b62-b45b-786bd7d50e7a(IDataReader )
at Dapper.SqlMapper.<QueryImpl>d__11`1.MoveNext() in d:\\Dev\\dapper-dot-net\\Dapper NET40\\SqlMapper.cs:line 1572
at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
at Dapper.SqlMapper.Query[T](IDbConnection cnn, String sql, Object param, IDbTransaction transaction, Boolean buffered, Nullable`1 commandTimeout, Nullable`1 commandType) in d:\\Dev\\dapper-dot-net\\Dapper NET40\\SqlMapper.cs:line 1443
at MyProject.DapperBase.Query[TResult](String command, DynamicParameters parameters, IDbTransaction transaction, Boolean buffered, Int32 commandTimeout) in d:\\MyProject\\DapperBase.cs:line 122
at MyProject.WorkflowData.Get(Guid identifier) in d:\\MyProject\\WorkflowData.cs:line 41
at MyProject.WorkflowLogic.Save(Workflow workflow) in d:\\MyProject\\WorkflowLogic.cs:line 34
at MyProject.WorkflowsController.Save(Guid id, WorkflowRequest request) in d:\\MyProject\\WorkflowsController.cs:line 97
InnerException: Invalid cast from 'System.String' to 'System.Xml.Linq.XDocument'.
at System.Convert.DefaultToType(IConvertible value, Type targetType, IFormatProvider provider)at System.String.System.IConvertible.ToType(Type type, IFormatProvider provider)
at System.Convert.ChangeType(Object value, Type conversionType, IFormatProvider provider)
at System.Convert.ChangeType(Object value, Type conversionType)
at Deserialize038b29f4-d97d-4b62-b45b-786bd7d50e7a(IDataReader )
Other than modifying my POCO to use a string datatype and then convert the string into an XDocument elsewhere, is there a way of getting Dapper to correctly deserialise the XML from the database?
In the end, I just brute-forced it:
public class Workflow
{
public Guid InstanceId { get;set; }
public XDocument StateIn { set { State = value.ToString(); } }
public string State { get;set; }
public XDocument StateOut { get { return XDocument.Parse(State); } }
}
Dapper plays with the State value, and I just set the value on StateIn and read it off StateOut. I feel a little bit dirty coming up with a solution like this, but hey, it works.
Perhaps creating a custom type handler can help? Something like:
public class XDocumentTypeHandler : SqlMapper.TypeHandler<XDocument>
{
public override void SetValue(IDbDataParameter parameter, XDocument value)
{
// set value in db parameter.
}
public XDocument Parse(object value)
{
// parse value from db to an XDocument.
}
}
You have to add the type handler with SqlMapper.AddTypeHandler().
See a sample implementation.
I have a class with a (simple, first cut) implementation of user roles:
class User {
public Role Role { get; set; }
// ...
public User() { this.Role = Role.Normal; }
public void Save() { Membership.CreateUser(...) } // System.Web.Security.Membership
}
enum Role : int {
Invalid = 0,
Normal = 1,
SuperUser = 4096
}
Before adding the role, everything worked fine (if that matters).
Now, when I try to fetch users, this line fails:
toReturn = conn.Query<User>("SELECT TOP 1 * FROM dbo.UserProfile WHERE 1=1");
The stack trace (from ELMAH):
System.Data.DataException: Error parsing column 2 (Role=1 - Int16) ---> System.InvalidCastException: Specified cast is not valid.
at Deserialize06df745b-4fad-4d55-aada-632ce72e3607(IDataReader )
--- End of inner exception stack trace ---
at Dapper.SqlMapper.ThrowDataException(Exception ex, Int32 index, IDataReader reader) in c:\Dev\Dapper\Dapper\SqlMapper.cs:line 2126
at Deserialize06df745b-4fad-4d55-aada-632ce72e3607(IDataReader )
at Dapper.SqlMapper.<QueryInternal>d__d`1.MoveNext() in c:\Dev\Dapper\Dapper\SqlMapper.cs:line 827
at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
at Dapper.SqlMapper.Query[T](IDbConnection cnn, String sql, Object param, IDbTransaction transaction, Boolean buffered, Nullable`1 commandTimeout, Nullable`1 commandType) in c:\Dev\Dapper\Dapper\SqlMapper.cs:line 770
In the database, the column type for Role is smallint.
I'm using Dapper 1.12.1 from NuGet.
Gah. The answer was to make the database and class definitions match.
For smallint (which is what MigratorDotNet generated for me), I needed the enum to derive from short, not int. Everything works now.
Possibly useful Google Code issue: https://code.google.com/p/dapper-dot-net/issues/detail?id=32
This is a followup to my previous question, which got solved (thank you for that) but now I am stuck at another error.
I'm trying to save an image in my database (called 'Afbeelding'), for that I made a table which excists of:
id: int
souce: varbinary(max)
I then created a wcf service to save an 'Afbeelding' to the database.
private static DataClassesDataContext dc = new DataClassesDataContext();
[OperationContract]
public void setAfbeelding(Afbeelding a)
{
//Afbeelding a = new Afbeelding();
//a.id = 1;
//a.source = new Binary(bytes);
dc.Afbeeldings.InsertOnSubmit(a);
dc.SubmitChanges();
}
I then put a reference to the service in my project and when I press the button I try to save it to the datbase.
private void btnUpload_Click(object sender, RoutedEventArgs e)
{
Afbeelding a = new Afbeelding();
OpenFileDialog openFileDialog = new OpenFileDialog();
openFileDialog.Filter = "JPEG files|*.jpg";
if (openFileDialog.ShowDialog() == true)
{
//string imagePath = openFileDialog.File.Name;
//FileStream fileStream = new FileStream(imagePath, FileMode.Open, FileAccess.Read);
//byte[] buffer = new byte[fileStream.Length];
//fileStream.Read(buffer, 0, (int)fileStream.Length);
//fileStream.Close();
Stream stream = (Stream)openFileDialog.File.OpenRead();
Byte[] bytes = new Byte[stream.Length];
stream.Read(bytes, 0, (int)stream.Length);
string fileName = openFileDialog.File.Name;
a.id = 1;
a.source = new Binary { Bytes = bytes };
}
EditAfbeeldingServiceClient client = new EditAfbeeldingServiceClient();
client.setAfbeeldingCompleted +=new EventHandler<System.ComponentModel.AsyncCompletedEventArgs>(client_setAfbeeldingCompleted);
client.setAfbeeldingAsync(a);
}
void client_setAfbeeldingCompleted(object sender, System.ComponentModel.AsyncCompletedEventArgs e)
{
if (e.Error != null)
txtEmail.Text = e.Error.ToString();
else
MessageBox.Show("WIN");
}
However, when I do this, I get the following error:
System.ServiceModel.FaultException: The formatter threw an exception while trying to deserialize the message: There was an error while trying to deserialize parameter :a.
The InnerException message was 'There was an error deserializing the object of type OndernemersAward.Web.Afbeelding.
The maximum array length quota (16384) has been exceeded while reading XML data. This quota may be increased by changing the MaxArrayLength property on the XmlDictionaryReaderQuotas object used when creating the XML reader.'.
Please see InnerException for more details.
at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc) at System.ServiceModel.Channels.ServiceChannel.EndCall(String action, Object[] outs, IAsyncResult result)
at System.ServiceModel.ClientBase`1.ChannelBase`1.EndInvoke(String methodName, Object[] args, IAsyncResult result)
atOndernemersAward.EditAfbeeldingServiceReference.EditAfbeeldingServiceClient.EditAfbeeldingServiceClientChannel.EndsetAfbeelding(IAsyncResult result)
at OndernemersAward.EditAfbeeldingServiceReference.EditAfbeeldingServiceClient.OndernemersAward.EditAfbeeldingServiceReference.EditAfbeeldingService.EndsetAfbeelding(IAsyncResult result)
at OndernemersAward.EditAfbeeldingServiceReference.EditAfbeeldingServiceClient.OnEndsetAfbeelding(IAsyncResult result)
at System.ServiceModel.ClientBase`1.OnAsyncCallCompleted(IAsyncResult result)
I'm not sure what's causing this but I think it has something to do with the way I write the image to the database? (The array length is too big big, I don't really know how to change it)
Thank you for your help,
Thomas
looks like you need to change default reader quotas in binding, set lengths to appropriate values for you:
<readerQuotas maxDepth="32" maxStringContentLength="5242880" maxArrayLength="2147483646" maxBytesPerRead="4096" maxNameTableCharCount="5242880"/>
I'm using Spring JdbcTemplate, and I'm stuck at the point where I have a query that updates a column that is actually an array of int. The database is postgres 8.3.7.
This is the code I'm using :
public int setUsersArray(int idUser, int idDevice, Collection<Integer> ids) {
int update = -666;
int[] tipi = new int[3];
tipi[0] = java.sql.Types.INTEGER;
tipi[1] = java.sql.Types.INTEGER;
tipi[2] = java.sql.Types.ARRAY;
try {
update = this.jdbcTemplate.update(setUsersArrayQuery, new Object[] {
ids, idUser, idDevice }, tipi);
} catch (Exception e) {
e.printStackTrace();
}
return update;
}
The query is "update table_name set array_column = ? where id_user = ? and id_device = ?".
I get this exception :
org.springframework.dao.DataIntegrityViolationException: PreparedStatementCallback; SQL [update acotel_msp.users_mau set denied_sub_client = ? where id_users = ? and id_mau = ?]; The column index is out of range: 4, number of columns: 3.; nested exception is org.postgresql.util.PSQLException: The column index is out of range: 4, number of columns: 3.
Caused by: org.postgresql.util.PSQLException: The column index is out of range: 4, number of columns: 3.
I've looked into spring jdbc template docs but I can't find any help, I'll keep looking, anyway could someone point me to the right direction? Thanks!
EDIT :
Obviously the order was wrong, my fault...
I tried both your solutions, in the first case I had this :
org.springframework.jdbc.BadSqlGrammarException: PreparedStatementCallback; bad SQL grammar [update users set denied_sub_client = ? where id_users = ? and id_device = ?]; nested exception is org.postgresql.util.PSQLException: Cannot cast an instance of java.util.ArrayList to type Types.ARRAY
Trying the second solution I had this :
org.springframework.jdbc.BadSqlGrammarException: PreparedStatementCallback; bad SQL grammar [update users set denied_sub_client = ? where id_users = ? and id_device = ?]; nested exception is org.postgresql.util.PSQLException: Cannot cast an instance of [Ljava.lang.Object; to type Types.ARRAY
I suppose i need an instance of java.sql.Array, but how can I create it using JdbcTemplate?
After struggling with many attempts, we settled to use a little helper ArraySqlValue to create Spring SqlValue objects for Java Array Types.
usage is like this
jdbcTemplate.update(
"UPDATE sometable SET arraycolumn = ?",
ArraySqlValue.create(arrayValue))
The ArraySqlValue can also be used in MapSqlParameterSource for use with NamedParameterJdbcTemplate.
import static com.google.common.base.Preconditions.checkNotNull;
import java.sql.Array;
import java.sql.JDBCType;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Locale;
import org.springframework.jdbc.core.StatementCreatorUtils;
import org.springframework.jdbc.support.SqlValue;
public class ArraySqlValue implements SqlValue {
private final Object[] arr;
private final String dbTypeName;
public static ArraySqlValue create(final Object[] arr) {
return new ArraySqlValue(arr, determineDbTypeName(arr));
}
public static ArraySqlValue create(final Object[] arr, final String dbTypeName) {
return new ArraySqlValue(arr, dbTypeName);
}
private ArraySqlValue(final Object[] arr, final String dbTypeName) {
this.arr = checkNotNull(arr);
this.dbTypeName = checkNotNull(dbTypeName);
}
#Override
public void setValue(final PreparedStatement ps, final int paramIndex) throws SQLException {
final Array arrayValue = ps.getConnection().createArrayOf(dbTypeName, arr);
ps.setArray(paramIndex, arrayValue);
}
#Override
public void cleanup() {}
private static String determineDbTypeName(final Object[] arr) {
// use Spring Utils similar to normal JdbcTemplate inner workings
final int sqlParameterType =
StatementCreatorUtils.javaTypeToSqlParameterType(arr.getClass().getComponentType());
final JDBCType jdbcTypeToUse = JDBCType.valueOf(sqlParameterType);
// lowercasing typename for Postgres
final String typeNameToUse = jdbcTypeToUse.getName().toLowerCase(Locale.US);
return typeNameToUse;
}
}
this code is provided in the Public Domain
private static final String ARRAY_DATATYPE = "int4";
private static final String SQL_UPDATE = "UPDATE foo SET arr = ? WHERE d = ?";
final Integer[] existing = ...;
final DateTime dt = ...;
getJdbcTemplate().update(new PreparedStatementCreator() {
#Override
public PreparedStatement createPreparedStatement(final Connection con) throws SQLException {
final PreparedStatement ret = con.prepareStatement(SQL_UPDATE);
ret.setArray(1, con.createArrayOf(ARRAY_DATATYPE, existing));
ret.setDate(2, new java.sql.Date(dt.getMillis()));
return ret;
}
});
This solution is kind of workaround using postgreSQL built-in function, which definitely worked for me.
reference blog
1) Convert String Array to Comma Separated String
If you are using Java8, it's pretty easy. other options are here
String commaSeparatedString = String.join(",",stringArray); // Java8 feature
2) PostgreSQL built-in function string_to_array()
you can find other postgreSQL array functions here
// tableName ( name text, string_array_column_name text[] )
String query = "insert into tableName(name,string_array_column_name ) values(?, string_to_array(?,',') )";
int[] types = new int[] { Types.VARCHAR, Types.VARCHAR};
Object[] psParams = new Object[] {"Dhruvil Thaker",commaSeparatedString };
jdbcTemplate.batchUpdate(query, psParams ,types); // assuming you have jdbctemplate instance
The cleanest way I found so far is to first convert the Collection into an Integer[] and then use the Connection to convert that into an Array.
Integer[] idArray = ids.toArray(new Integer[0]);
Array idSqlArray = jdbcTemplate.execute(
(Connection c) -> c.createArrayOf(JDBCType.INTEGER.getName(), idArray)
);
update = this.jdbcTemplate.update(setUsersArrayQuery, new Object[] {
idSqlArray, idUser, idDevice })
This is based on information in the documentation: https://jdbc.postgresql.org/documentation/head/arrays.html
The argument type and argument is not matching.
Try changing the argument type order
int[] tipi = new int[3];
tipi[0] = java.sql.Types.ARRAY;
tipi[1] = java.sql.Types.INTEGER;
tipi[2] = java.sql.Types.INTEGER;
or use
update = this.jdbcTemplate.update(setUsersArrayQuery, new Object[] {
ids.toArray(), idUser, idDevice })
and see if it works
http://valgogtech.blogspot.com/2009/02/passing-arrays-to-postgresql-database.html explains how to create java.sql.Array postgresql
basically Array.getBaseTypeName should return int and Array.toString should return the array content in "{1,2,3}" format
after you create the array you can set it using preparedstatement.setArray(...)
from PreparedStatementCreator e.g.
jdbcTemplate.update(
new PreparedStatementCreator() {
public PreparedStatement createPreparedStatement(Connection connection) throws SQLException {
Good Luck ..
java.sql.Array intArray = connection.createArrayOf("int", existing);
List<Object> values= new ArrayList<Object>();
values.add(intArray);
values.add(dt);
getJdbcTemplate().update(SQL_UPDATE,values);