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  • RESTful Design: Paging Collections

    - by Koen Bok
    I am designing a REST api that needs paging (per x) enforces from the server side. What would be the right way to page through any collection of resources: Option 1: GET /resource/page/<pagenr> GET /resource/tags/<tag1>,<tag2>/page/<pagenr> GET /resource/search/<query>/page/<pagenr> Option 2: GET /resource/?page=<pagenr> GET /resource/tags/<tag1>,<tag2>?page=<pagenr> GET /resource/search/<query>?page=<pagenr> If 1, what should I do with GET /resource? Redirect to /resource/page/0, reply with some error or reply with the exact same as /resource/page/0 without redirecting?

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  • Group by/count in LINQ against SQL Compact 3.5 SP2

    - by bash74
    Hello, I am using LINQ-To-Entities in C# and run queries against a SQL Compact Server 3.5 SP2. What I try to achieve is a simple group by with an additional where clause which includes a Count(). var baseIdent="expression"; var found=from o in ObservedElements where o.ObservedRoots.BaseIdent==baseIdent group o by o.ID into grouped where grouped.Count()==1 select new {key=grouped.Key, val=grouped}; foreach(var res in found){ //do something here } This query throws the famous exception "A parameter is not allowed in this location. Ensure that the '@' sign and all other parameters are in a valid location in the SQL statement." When I either omit the where clause OR directly enter the expression "expression" in the query (where o.ObservedRoots.BaseIdent=="expression") everything just works fine. Does anybody know how to solve this? Workaround would also be fine? Thanks in advance, Sebastian

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  • How to calculate change in ANSI SQL

    - by morpheous
    I have a table that contains sales data. The data is stored in a table that looks like this: CREATE table sales_data ( sales_time timestamp , sales_amt double ) I need to write parameterized queries that will allow me to do the following: Return the change in sales_amt between times t2 and t1, where t2 and t1 are separated by a time interval (integer) of N. This query will allow for querying for weekly changes in sales (for example). Return the change in change of sales_amt between times t2 and t1, and time t3 and t4. Thats is to calculate the value (val(t2)-val(t1)) - (val(t4)-val(t3)). where t2 and t1 are separated by the same time interval (interval N) as the interval between t4 and t3. This query will allow for querying for changes in weekly changes in sales (for example).

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  • fill dropdown list by querystring

    - by KareemSaad
    I Had Drop down list and I want to fill it with data from database through stored procedure and it had it,s value when specific query string I had two query string. as private void LoadWithCategory() { if (Request.QueryString["Category_Id"] != null) { using (SqlConnection Con = Connection.GetConnection()) { SqlCommand Com = new SqlCommand("GetProducFamilyTP", Con); Com.CommandType = CommandType.StoredProcedure; Com.Parameters.Add(Parameter.NewInt("@Category_Id", Request.QueryString["Category_Id"])); SqlDataReader DR = Com.ExecuteReader(); if (DR.Read()) { DDLProductFamily.DataSource = DR; DDLProductFamily.DataTextField = DR["Name"].ToString(); DDLProductFamily.DataValueField = DR["ProductCategory_Id"].ToString(); DDLProductFamily.DataBind(); } DR.Close(); } } } ALTER Proc GetProducFamilyTP ( @Category_Id Int ) AS Select Distinct Categories.Category_Id ,ProductCategory.Name , ProductCategory.ProductCategory_Id From Category_ProductCategory Inner Join Categories On Category_ProductCategory.Category_Id=Categories.Category_Id Inner Join ProductCategory On Category_ProductCategory.ProductCategory_Id=ProductCategory.ProductCategory_Id Where Categories.Category_Id =@Category_Id but this error occurred DataBinding: 'System.Data.Common.DataRecordInternal' does not contain a property with the name '4Door'.

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  • whats wrong in this LINQ synatx?

    - by Saurabh Kumar
    Hi, I am trying to convert a SQL query to LINQ. Somehow my count(distinct(x)) logic does not seem to be working correctly. The original SQL is quite efficient(or so i think), but the generated SQL is not even returning the correct result. I am trying to fix this LINQ to do what the original SQL is doing, AND in an efficient way as the original query is doing. Help here would be really apreciated as I am stuck here :( SQL which is working and I need to make a comparable LINQ of: SELECT [t1].[PersonID] AS [personid] FROM [dbo].[Code] AS [t0] INNER JOIN [dbo].[phonenumbers] AS [t1] ON [t1].[PhoneCode] = [t0].[Code] INNER JOIN [dbo].[person] ON [t1].[PersonID]= [dbo].[Person].PersonID WHERE ([t0].[codetype] = 'phone') AND ( ([t0].[CodeDescription] = 'Home') AND ([t1].[PhoneNum] = '111') OR ([t0].[CodeDescription] = 'Work') AND ([t1].[PhoneNum] = '222') ) GROUP BY [t1].[PersonID] HAVING COUNT(DISTINCT([t1].[PhoneNum]))=2 The LINQ which I made is approximately as below: var ids = context.Code.Where(predicate); var rs = from r in ids group r by new { r.phonenumbers.person.PersonID} into g let matchcount=g.Select(p => p.phonenumbers.PhoneNum).Distinct().Count() where matchcount ==2 select new { personid = g.Key }; Unfortunately, the above LINQ is NOT generating the correct result, and is actually internally getting generated to the SQL shown below. By the way, this generated query is also reading ALL the rows(about 19592040) around 2 times due to the COUNTS :( Wich is a big performance issue too. Please help/point me to the right direction. Declare @p0 VarChar(10)='phone' Declare @p1 VarChar(10)='Home' Declare @p2 VarChar(10)='111' Declare @p3 VarChar(10)='Work' Declare @p4 VarChar(10)='222' Declare @p5 VarChar(10)='2' SELECT [t9].[PersonID], ( SELECT COUNT(*) FROM ( SELECT DISTINCT [t13].[PhoneNum] FROM [dbo].[Code] AS [t10] INNER JOIN [dbo].[phonenumbers] AS [t11] ON [t11].[PhoneType] = [t10].[Code] INNER JOIN [dbo].[Person] AS [t12] ON [t12].[PersonID] = [t11].[PersonID] INNER JOIN [dbo].[phonenumbers] AS [t13] ON [t13].[PhoneType] = [t10].[Code] WHERE ([t9].[PersonID] = [t12].[PersonID]) AND ([t10].[codetype] = @p0) AND ((([t10].[codetype] = @p1) AND ([t11].[PhoneNum] = @p2)) OR (([t10].[codetype] = @p3) AND ([t11].[PhoneNum] = @p4))) ) AS [t14] ) AS [cnt] FROM ( SELECT [t3].[PersonID], ( SELECT COUNT(*) FROM ( SELECT DISTINCT [t7].[PhoneNum] FROM [dbo].[Code] AS [t4] INNER JOIN [dbo].[phonenumbers] AS [t5] ON [t5].[PhoneType] = [t4].[Code] INNER JOIN [dbo].[Person] AS [t6] ON [t6].[PersonID] = [t5].[PersonID] INNER JOIN [dbo].[phonenumbers] AS [t7] ON [t7].[PhoneType] = [t4].[Code] WHERE ([t3].[PersonID] = [t6].[PersonID]) AND ([t4].[codetype] = @p0) AND ((([t4].[codetype] = @p1) AND ([t5].[PhoneNum] = @p2)) OR (([t4].[codetype] = @p3) AND ([t5].[PhoneNum] = @p4))) ) AS [t8] ) AS [value] FROM ( SELECT [t2].[PersonID] FROM [dbo].[Code] AS [t0] INNER JOIN [dbo].[phonenumbers] AS [t1] ON [t1].[PhoneType] = [t0].[Code] INNER JOIN [dbo].[Person] AS [t2] ON [t2].[PersonID] = [t1].[PersonID] WHERE ([t0].[codetype] = @p0) AND ((([t0].[codetype] = @p1) AND ([t1].[PhoneNum] = @p2)) OR (([t0].[codetype] = @p3) AND ([t1].[PhoneNum] = @p4))) GROUP BY [t2].[PersonID] ) AS [t3] ) AS [t9] WHERE [t9].[value] = @p5 Thanks!

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  • Using LINQ-To-Entities to Generate Information

    - by parminder
    I am working on a website where a user can add tags to their posted books, much like is currently done for questions on Stack Overflow. Classes: Books { bookId, Title } Tags { Id Tag } BooksTags { Id BookId TagId } Here are few sample records. Books BookId Title 113421 A 113422 B Tags Id Tag 1 ASP 2 C# 3 CSS 4 VB 5 VB.NET 6 PHP 7 java 8 pascal BooksTags Id BookId TagId 1 113421 1 2 113421 2 3 113421 3 4 113421 4 5 113422 1 6 113422 4 7 113422 8 Questions I need to write something in LINQ to entity queries which gives me data according to the tags: Query: bookIds where tagid = 1 Returns: bookid: 113421, 113422 Query 2: tags 1 and 2 Returns: 113421 I need tags and their count to to show in related tags, so in first case my related tags class should have following result. RelatedTags Tag Count 2 1 3 1 4 2 8 1 Second Case: RelatedTags Tag Count 3 1 4 1 How do I do this in LINQ?

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  • How to get all paths in drupal install

    - by Aaron
    Hi, I need to write a module that gives me a page will all possible paths in a drupal install, including orphaned pages. (site map won't work for that). I can query the url_alias table for aliases, and I can query the menu_router table for all paths, even ones set in page/feed displays in views. But, variable paths (those with arguments) get interpreted at run-time. So, is there a way to get all possible paths in a drupal install, including dynamic paths and orphans? It's catch22. I have to know all the urls ahead of time to get them.

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  • C# SqlDataAdapter not populating DataSet

    - by Wesley
    I have searched the net and searched the net only to not quite find the probably I am running into. I am currently having an issue getting a SqlDataAdapter to populate a DataSet. I am running Visual Studio 2008 and the query is being sent to a local instance of SqlServer 2008. If I run the query itself in SqlServer, I do get information. Code is as follows: string theQuery = "select Password from Employees where employee_ID = '@EmplID'"; SqlDataAdapter theDataAdapter = new SqlDataAdapter(); theDataAdapter.SelectCommand = new SqlCommand(theQuery, conn); theDataAdapter.SelectCommand.Parameters.Add("@EmplID", SqlDbType.VarChar).Value = "EmployeeName"; theDataAdapter.Fill(theSet); The code to read the dataset: foreach (DataRow theRow in theSet.Tables[0].Rows) { //process row info } If there is any more info I can supply please let me know.

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  • How to give weight to full matches over partial matches (PostgreSQL)

    - by kagaku
    I've got a query that takes an input searches for the closet match in zipcode/region/city/metrocode in a location table containing a few tens of thousands of entries (should be nearly every city in the US). The query I'm using is: select metrocode, region, postalcode, region_full, city from dv_location where ( region ilike '%Chicago%' or postalcode ilike '%Chicago%' or city ilike '%Chicago%' or region_full ilike'%Chicago%' ) and metrocode is not null Odd thing is, the results set I'm getting back looks like this: metrocode;region;postalcode;region_full;city 862;CA;95712;California;Chicago Park 862;CA;95712;California;Chicago Park 602;IL;60611;Illinois;Chicago 602;IL;60610;Illinois;Chicago What am I doing wrong? My thinking is that Chicago would have greater weight than Chicago Park since Chicago is an exact match to the term (even though I'm asking for a wildcard match on the term).

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  • Convert Date to Datetime field.

    - by infant programmer
    The argument my C# function is getting is a string which is merely a Date or a DateTime. I am suppose to convert this String to DateTime, to carry on furthure calculation. Now I need to test whether the incoming data is a Date, if it is date(examle:"12/31/2009"), then I need to add "00:00:00" (24 hours format) to it, so that it will become "12/31/2009 00:00:00". If string manipulation is one possible way, I want to confirm whether there is some other way where we can automate the testing and conversion within DateTime.TryParseExact() method. This is my sample C# code : (which is now only able to convert string of format "MM/dd/yyyy HH:mm:ss" to DateTime.) private static string[] formats = new string[] { "MM/dd/yyyy HH:mm:ss" }; public string date_conv(string date_str) { DateTime date_value; DateTime.TryParseExact(date_str, formats, new global::System.Globalization.CultureInfo("en-US"), global::System.Globalization.DateTimeStyles.None, out date_value); /*Some useful instruction to use date_value*/ return(date_value.ToString("MM/dd/yyyy HH:mm:ss")); }

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  • Php fetch rows from multiple MySQL tables

    - by Jon McIntosh
    Right now I am fetching all of the rows from one of my tables: query = "SELECT * FROM thread WHERE threadid = 2 ORDER BY threadid DESC"; $result = mysql_query($query); $num_rows = mysql_num_rows($result); if((!is_bool($result) || $result) && $num_rows) { while($row = mysql_fetch_array($result)) { $thread = $row['title']; $threadID = $row['threadid']; $poster = $row['postusername']; } What I want to do is go to another table on my database: "post_display", and get the row 'text' where the threadid = 2.

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  • How to do relative imports in Python?

    - by Joril
    Imagine this directory structure: app/ __init__.py sub1/ __init__.py mod1.py sub2/ __init__.py mod2.py I'm coding mod1, and I need to import something from mod2. How should I do it? I tried from ..sub2 import mod2 but I'm getting an "Attempted relative import in non-package". I googled around but found only "sys.path manipulation" hacks. Isn't there a clean way? Edit: all my __init__.py's are currently empty Edit2: I'm trying to do this because sub2 contains classes that are shared across sub packages (sub1, subX, etc.). Edit3: The behaviour I'm looking for is the same as described in PEP 366 (thanks John B)

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  • SQL - Finding continuous entries of a given size.

    - by ByteMR
    I am working on a system for reserving seats. A user inputs how many seats they wish to reserve and the database will return a set of suggested seats that are not previously reserved that matches the number of seats being reserved. For instance if I had the table: SeatID | Reserved ----------------- 1 | false 2 | true 3 | false 4 | false 5 | false 6 | true 7 | true 8 | false 9 | false 10 | true And the user inputs that they wish to reserve 2 seats, I would expect the query to return that seats (3, 4), (4, 5), and (8, 9) are not reserved and match the given number of input seats. Seats are organized into sections and rows. Continuous seats must be in the same row. How would I go about structuring this query to work in such a way that it finds all available continuous seats that match the given input?

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  • not returning anything from postgresql function?

    - by netllama
    Is it possible for a PostgreSQL plpgsql function to not return anything? I've created a function, and I don't need it to return anything at all, as it performs a complex SQL query, and inserts the results of that query into another table (SELECT INTO ....). Thus, I have no need or interest in having the function return any output or value. Unfortunately, when I try to omit the RETURN clause of the function declaration, I can't create the function. Is it possible for a PostgreSQL plpgsql function to not return anything?

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  • NHibernate HQL logic problem

    - by Jon
    Hi I'm trying to write an NHibernate HQL query that makes use of parenthesis in the where clause. However, the HQL parser seems to be ignoring my parenthesis, thus changing the meaning of my statement. Can anyone shed any light on the matter? The following HQL query: from WebUser u left join fetch u.WebUserProfile left join fetch u.CommunicationPreferences where (u.CommunicationPreferences.Email = 0 and u.SyncDate is not null) or u.DateDeleted is not null translates to: from WebUser webuser0_ left outer join WebUserProfile webuserpro1_ on webuser0_.UserId = webuserpro1_.WebUserId left outer join WebUserCommunicationPreferences communicat2_ on webuser0_.UserId = communicat2_.UserId where communicat2_.Email = 0 and (webuser0_.SyncDate is not null) or webuser0_.DateDeleted is not null Thanks Jon

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  • Slow page unload in IE

    - by ForYourOwnGood
    I am developing a site which creates many table rows dynamically. The total amount of rows right now is 187. Everything works fine when creating the rows, but in IE when I leave the page, there is a large amount of lag. I do not know if this is some how related to the heavy DOM manipulation I am doing in the page? I do not create any function closures when building the dynamic content's event handlers so I do not believe this problem is related to memory leaks. Any insight is much appreciated.

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  • Can I combine values from multiple rows in another table into multiple columns of one row using SQL?

    - by Jordi
    I have two tables: T1: | M_ID | P_ID1 | P_ID2 | rest of T1 columns | | 0 | 0 | 1 | ... | | 1 | 2 | 3 | ... | T2: | P_ID | Type | A | B | | 0 | 1 | a | e | | 1 | 2 | b | f | | 2 | 1 | c | g | | 3 | 2 | d | h | Now, I want to have a query that selects this: | M_ID | P_1a | P_1b | P_2a | P_2b | rest of T1 columns | | 0 | a | e | b | f | ... | | 1 | c | g | c | h | ... | So, in words: I want to select all columns from T1, but I want to replace P_ID1 with the columns from T2, where the P_ID is equal to P_ID1, and the type is 1, and basically the same for P_ID2. I can obviously get the information I need with multiple queries, but I was wondering if there is a way that I can do this with one query. Any ideas? I'm currently using SQL Server 2008r2, but I'd also be interested in solutions for other database software. Thanks for the help!

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  • Select from table and function

    - by David Oneill
    I have a function that returns a table. The returned table contains (among other things) a store_id. I can get the store_id for a particular transaction_id and city_id as follows: select store_id from table(f_get_store(city_id, transaction_id)); I have another table that contains a list of transactions (which includes transaction_id and city_id). I want a query that returns store_id, city_id, transaction_id for every entry in the transaction table. My first guess was: select f_get_store(city_id, transaction_id), city_id, transaction_id from table; (simplified away the unimportant details) However, this yields an "ORA-00932: inconsistent datatypes" error. How do I need to structure this query? (I'm using Oracle)

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  • C# LINQ Where Predicate Type Arguments

    - by blu
    I have an XElement with values for mock data. I have an expression to query the xml: Expression<Func<XElement, bool>> simpleXmlFunction = b => int.Parse(b.Element("FooId").Value) == 12; used in: var simpleXml = xml.Elements("Foo").Where(simpleXmlFunction).First(); The design time error is: The type arguments for method 'System.Linq.Enumerable.Where(System.Collections.Generic.IEnumerable, System.Func)' cannot be inferred from the usage. Try specifying the type arguments explicitly' The delegate supplied to Where should take in an XElement and return a bool, marking if the item matches the query, I am not sure how to add anything more to the delegate or the where clause to mark the type. Also, the parallel method for the real function against the Entity Framework does not have this issue. What is not correct with the LINQ-to-XML version?

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  • PHP 5.2 Function needed for GENERIC sorting of a recordset array

    - by donbriggs
    Somebody must have come up with a solution for this by now. We are using PHP 5.2. (Don't ask me why.) I wrote a PHP class to display a recordset as an HTML table/datagrid, and I wish to expand it so that we can sort the datagrid by whichever column the user selects. In the below example data, we may need to sort the recordset array by Name, Shirt, Assign, or Age fields. I will take care of the display part, I just need help with sorting the data array. As usual, I query a database to get a result, iterate throught he result, and put the records into an assciateiave array. So, we end up with an array of arrays. (See below.) I need to be able to sort by any column in the dataset. However, I will not know the column names at design time, nor will I know if the colums will be string or numeric values. I have seen a ton of solutions to this, but I have not seen a GOOD and GENERIC solution Can somebody please suggest a way that I can sort the recordset array that is GENERIC, and will work on any recordset? Again, I will not know the fields names or datatypes at design time. The array presented below is ONLY an example. UPDATE: Yes, I would love to have the database do the sorting, but that is just not going to happen. The queries that we are running are very complex. (I am not really querying a table of Star Trek characters.) They include joins, limits, and complex WHERE clauses. Writing a function to pick apart the SQL statement to add an ORDER BY is really not an option. Besides, sometimes we already have the array that is a result of the query, rather than the ability to run a new query. Array ( [0] => Array ( [name] => Kirk [shrit] => Gold [assign] => Bridge ) [1] => Array ( [name] => Spock [shrit] => Blue [assign] => Bridge ) [2] => Array ( [name] => Uhura [shrit] => Red [assign] => Bridge ) [3] => Array ( [name] => Scotty [shrit] => Red [assign] => Engineering ) [4] => Array ( [name] => McCoy [shrit] => Blue [assign] => Sick Bay ) )

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  • double left MYSQL join?

    - by Haroldo
    I've been trying left joins but as there are 2 joins, i think the problem is the 2nd join roots from table_B not table_A. i am not getting any results where there is the required data in the db. I am not getting a query error the query (simplified) SELECT events.*, ven.*, events_genres.* FROM events LEFT JOIN ven //OPTIONAL JOIN ON events.ven_id = ven.ven_id //OPTIONAL JOIN LEFT JOIN events_genres //REQUIRED JOIN ON events.event_id = events_genres.event_id //REQUIRED JOIN WHERE events.date >= '$this->now' AND WHERE events_genres.g_id = $g_id //REQUIRED MATCH ORDER BY date ven = optional, i'll have the info if its there. events_genres = required, i dont want any results that do not have a genre

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  • CONTAINSTABLE with wildcard works different in SQL Server 2005 and SQL Server 2008?

    - by musuk
    I have two same databases one on SQL Server 2005 and one on SQL Server 2008, it have same SQL_Latin1_General_CP1_CI_AS Collation, and full text search catalogs have the same settings. These two databases contains table with same data, NTEXT string: "...kræve en forklaring fra miljøminister Connie Hedegaard.." My problem is: CONTAINSTABLE on SQL Server 2008 finds nothing if query is: select * from ContainsTable(SearchIndex_7, Content, '"miljø*"') ct but SQL Server 2005 works perfectly and finds necessary record. SQL Server 2008 finds necessary record if query is: select * from ContainsTable(SearchIndex_7, Content, '"milj*"') ct or select * from ContainsTable(SearchIndex_7, Content, '"miljøminister"') What can be reason for so strange behavior?

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  • MOSS Collect Data from user custom email

    - by nav
    Hi, I am trying to send out a custom email, after the Collect Data from user step in my primary workflow which starts when an item in list X is created. I have created a secondary workflow to start when a new Task item is created (this is created by the Collect Data from user action in the primary workflow). But I am having problem how I retrieve the information on the list X. I know the ID of the referenced item in List X is stored in a URL within the "Link" column in the Tasks lists. But can't see any string manipulation function that will grab this ID so I can use it to link back to relevant item in List X. Is there an easier way to do this? Many Thanks, Nav

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  • Unable to convert MySQL date/time value to System.DateTime

    - by Sri Kumar
    Hello I am using ibatis and C#. i get a result from a select query that has CreatedDate as one of the field. The Datatype of CreatedDate in Mysql is Date. I assign the result set of the select query to a Ilist< DeliveryClass **. Here the DeliveryClass CreatedDate as DateTime. When i run the application, i get **Unable to convert MySQL date/time value to System.DateTime. What could be the problem?

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  • How to eager fetch a child collection while joining child collection entities to an association

    - by ShaneC
    Assuming the following fictional layout Dealership has many Cars has a Manufacturer I want to write a query that says get me a Dealership with a Name of X and also get the Cars collection but use a join against the manufacturer when you do so. I think this would require usage of ICriteria. I'm thinking something like this.. var dealershipQuery = Session.CreateCriteria< Dealership>("d") .Add(Restrictions.InsenstiveLike("d.Name", "Foo")) .CreateAlias("d.Cars", "c") .SetFetchMode("d.Cars", FetchMode.Select) .SetFetchMode("c.Manufacturer", FetchMode.Join) .UniqueResult< Dealership>(); But the resulting query looks nothing like I would have expected. I'm starting to think a DetachedCriteria may be required somewhere but I'm not sure. Thoughts?

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