I have been able to get the values from tables using linq.
var q=(from app in context.Applicant
where app.ApplicantName=="")
Now what I want is this:
var q=(from app in context.Applicant
where app.stringIhave =="") // so instead of column name I have string which has same name as column.
Is it possible to specify string in Select as this is not sure what I will get in each case, I need different data all the time.
Is it possible to do so?
If no, then I will figure out something else.
Update
I have a GlobalString, which holds the column name of a table.
So when I query that table, I only specify from string which column value I want to get:
var q=(from app in context.Applicants
where app.ID==1013
select GlobalString //which is specifying that I want to get value from which column, as column name is not fixed.
//where GlobalString can have values like: app.FirstName..app.LastName etc
Update1:
var q = context.Applicants.Select("new(it.ApplicantFirstName as FirstName, it.ApplicantLastName as LastName)");
Error Message:
The query syntax is not valid. Near keyword 'AS'
You can use Dynamic Linq (available from NuGet) for that:
var q = context.Applicant.Where(app.stringIhave + " = #0", "");
for select you can try something like this
var q = context.Applicant.Select("new(it.FirstName as FirstName, it.LastName as LastName)");
so you only need construct string for that format
Related
I'm trying to create a calculated column indicating if a team has a prize or not from the table below:
To do that I need to count within the group if there's a player whose "Prize" field is not empty. Here's the 1st attempt:
Dax Formula:
=
Var Player_Same_Team = filter(Table4,Table4[Team]=earlier(Table4[Team]))
Var Has_Prize = len(Table4[Prize])>0
Return
calculate(countrows(filter(Table4,len(Table4[Prize])>0)),Player_Same_Team)>0
Looks like it's going what I intend it to do. However, when I swap the filter content to a pre-defined variable, it gave me results that don't make sense:
Dax Formula:
=
Var Player_Same_Team = filter(Table4,Table4[Team]=earlier(Table4[Team]))
Var Has_Prize = len(Table4[Prize])>0
Return
calculate(countrows(filter(Table4,Has_Prize)),Player_Same_Team)>0
The typed content len(Table4[Prize])>0 is the same as that in the variable, so what may be causing the difference? Thanks for your help.
As soon as you assign it to a variable, the value of the variable remains constant. Therefore the Len is evaluated to a value, that you are then passing as a filter.
The first example works because the CALCULATE accepts a table as a parameter, and player_same_team is evaluated to a table, by using the FILTER expression.
In order for what you are trying to do to work it would have to be something like this:
= Var Player_Same_Team = filter(Table4,Table4[Team]=earlier(Table4[Team]))
Var Has_Prize = filter(Table4,len(Table4[Prize])>0)
Return calculate(countrows(Has_Prize),Player_Same_Team)>0
You can also write the measure in a slightly different way:
= CALCULATE ( COUNT(Table4[Team]),
ALLEXCEPT(Table4[Team]),
LEN(Table4[Prize])>0) > 0
I am using power query to load some json data in a table (matches). I want to use a specific part of that data (fixture_id) as a parameter for another json request in another query (predictions), and then combine that output in my main (matches) table. Anyone can point me in the right direction on how to do this ?
So here is my matches table:
And then in my fixtures table i can maybe i have:
apiKey = Excel.CurrentWorkbook(){[Name="ApiKey"]}[Content]{0}[Column1],
fixtureID = "?",
Source = Json.Document(Web.Contents("https://v2.api-football.com/predictions/" & fixtureID, [Headers=[#"X-RapidAPI-Key"=apiKey]])),
If i hardcode the fixtureID, i get this output:
But i want to calculate it dynamically, and then merge the output to the matches table.
The first step is to turn your request into a function that accepts parameters. Put your request on a new blank query:
let
fnGetData = (fixtureID as text) =>
let
apiKey = Excel.CurrentWorkbook(){[Name="ApiKey"]}[Content]{0}[Column1],
fixtureID = "?",
Source = Json.Document(Web.Contents("https://v2.api-football.com/predictions/"
& fixtureID, [Headers=[#"X-RapidAPI-Key"=apiKey]]))
in
Source
in
fnGetData
Rename it to fnGetData.
Then, go to your table and click on Add Column/Add Custom Function. Select fnGetData and the input parameter is your fixtureID column. This should make all the requests and you'll just have to expand the new column results.
I have a query where I need to retrieve a column which I need only temporarily because I need to pass it in the parameter for a where clause, how can I remove this column and its value from my result set after it served that purpose. Hopefully the code will show what I mean...
def empQuery = "select id, name, address from Employee"
def retObj = [:]
def sql = new Sql(datasource)
retObj = sql.rows(empQuery.toString())
retObj.each {
def addressQuery = "select street from Address where employe_id = ${it['id']}
// at this point I want to remove 'id:n' from the result set hash map aka 'it'
}
Because later on I am displaying that result set on a page for the user, and the ID field is not relevant.
So can you please show the Groovy code to remove a column and its value from the rows data structure returned from sql.rows?
from http://docs.groovy-lang.org/latest/html/api/groovy/sql/GroovyRowResult.html
It looks like you can do something line:
retObj.each { it.remove('id')}
However I haven't tried it....
I have a multivalue field called freeDaysPool which has multiple dates as strings. With the following code, the search does not return anything. If I leave that field out, the search works just fine with the two other fields. I read that I should use CONTAINS with multivalue fields but then I got query not understandable.
I've tried the back-end field as a date field and as a text field and tested all kinds of query combinations and date formats but no luck. Any help is really appreciated.
This is the search button code:
var query = new Array("");
var cTerms = 0;
// Field 1
var search01 = getComponent("searchcustomReservationField01").getValue();
if (#Contains(#Text(search01),"any city")){"";}
else {query[cTerms++] = '[customReservationField01]="' + search01 +'"'};
// Field 2
var search02 = getComponent("searchcustomReservationField02").getValue();
if (#Contains(#Text(search02),"any city")){"";}
else {query[cTerms++] = '[customReservationField02]="' + search02 + '"'};
// Date 1
var formatter = new java.text.SimpleDateFormat("d.M.yyyy");
query[cTerms++] = 'FIELD freeDaysPool = ' + formatter.format(getComponent("searchcustomDateField01").getValue());
// if query is still empty, we fill it with asterisk
if(query == "" || query == null){
query[cTerms++] = "*";
}
// make all as string
qstring = query.join(" AND ").trim();
sessionScope.searchString = qstring;
It will return query as:
[customReservationField01]="Oslo" AND [customReservationField02]="Oslo" AND FIELD freeDaysPool = 6.2.2015
AFAIK date values in formulas (and a query is a formula) have to be noted like
[06.02.2015]
to compare them. Just try to use your formular in the Notes Client to do a fulltext search. If you get results and no errors you found the correct format. That's at least the way I test queries as I'm not able to remind the syntax for years :-D
Thank you for all the help! Seems that Domino keeps the field type as date field even if you change it back to text field (noticed that from the notes FTsearch). I created completely new text field and added the days as strings in dd.MM.yyyy format. I also search them as strings and it works fine.
The changed code bit now looks like this:
// Date 1
var formatter = new java.text.SimpleDateFormat("dd.MM.yyyy");
query[cTerms++] = '[freeDays] CONTAINS "' + formatter.format(getComponent("searchcustomDateField01").getValue())+'"';
using (IDbConnection db = dbFactory.OpenDbConnection()) {
List<long> x = db.SelectLazy<long>(
"SELECT Id FROM MyTable").ToList();
}
Why is x null?
It works when I use Select instead of SelectLazy, or when I use SelectLazy on the entire row and not just the Id.
In OrmLite you use different API's to match the results you're after, e.g:
Select* API's for returning a List<MyTable>
Column* API's for returning a column of field values, e.g List<long>
Single* API's for returning a Single Row, e.g Table
Scalar* API's for returning a Single field value, e.g long
So to select a column as a List of fields you use db.Column, e.g:
var results = db.Column<long>(db.From<MyTable>().Select(x => x.Id));
These also have Raw Sql* equivalents, e.g:
var results = db.SqlColumn<long>("SELECT Id FROM MyTable");