So i have this criteria query that is getting 10 feature articles that have itemchannel objects that are of type 4 and in a channel of id 1 i.e get me top 10 articles which are of type feature and in channel x.
def criteria = Feature.createCriteria()
list = criteria.list {
maxResults(params.max)
itemChannels {
eq ('itemType.id',(long)4)
eq ('channel.id',(long)1)
}
}
How do i get the total count efficiently i.e. i have the articles for page 1 but i need the total number for pagination?
Thanks
Think i sorted this.
criteria = Feature.createCriteria()
count = criteria.get{
projections {
countDistinct('id')
}
itemChannels {
eq ('itemType.id',(long)4)
eq ('channel.id',(long)2)
}
}
Related
My scenario is i have a grid with search option where user can select the column and can do the search, the grid data is coming from various tables. I have attached a sample screen of grid.
User Screen
So i'm trying to create a dynamic query for search but the problem is i can able to search only in main table (schema.Robot) not in Preload tables. whenever i trying to search data data from Preload tables let say from RobotModel table that time getting below error
pq: missing FROM-clause entry for table "robot_models"
Here is my go code
func (r *RobotsRepository) GetRobotsSummary(listParams viewmodel.ListParams, companyID uint) ([]*schema.Robot, int, error) {
mrobots := []*schema.Robot{}
var count int
var order string
if listParams.SortColumn == "" {
listParams.SortColumn = "id"
listParams.SortOrder = 1
} else {
listParams.SortColumn = util.Underscore(listParams.SortColumn)
}
if listParams.SortOrder == 0 {
order = "ASC"
} else {
order = "DESC"
}
var searchQuery string
if listParams.SearchText != "" {
switch listParams.SearchColumn {
case "Robot":
listParams.SearchColumn = "name"
case "Model":
listParams.SearchColumn = "robot_models.name"
}
searchQuery = listParams.SearchColumn +" LIKE '%"+ listParams.SearchText +"%' and Company_ID = " + fmt.Sprint(companyID)
}else{
searchQuery = "Company_ID = " + fmt.Sprint(companyID)
}
orderBy := fmt.Sprintf("%s %s", listParams.SortColumn, order)
err := r.Conn.
Preload("RobotModel", func(db *gorm.DB) *gorm.DB {
return db.Select("ID,Name")
}).
Preload("Task", func(db *gorm.DB) *gorm.DB {
return db.Where("Task_Status in ('In-Progress','Pending')").Select("ID, Task_Status")
}).
Preload("CreatedUser", func(db *gorm.DB) *gorm.DB {
return db.Select("ID,Display_Name")
}).
Preload("UpdatedUser", func(db *gorm.DB) *gorm.DB {
return db.Select("ID,Display_Name")
}).
Where(searchQuery).
Order(orderBy).
Offset(listParams.PageSize * (listParams.PageNo - 1)).
Limit(listParams.PageSize).
Find(&mrobots).Error
r.Conn.Model(&schema.Robot{}).Where(searchQuery).Count(&count)
return mrobots, count, err
}
In searchQuery variable i'm storing my dynamic query.
My question is how can i search data for preload table columns
Here is the sql query which i'm trying to achieve using gorm
SELECT robots.id,robots.name,robot_models.name as
model_name,count(tasks.task_status) as task_on_hand,
robots.updated_at,users.user_name as updated_by
FROM rfm.robots as robots
left join rfm.tasks as tasks on tasks.robot_id = robots.id and
tasks.task_status in ('In-Progress','Pending')
left join rfm.robot_models as robot_models on robot_models.id =
robots.robot_model_id
left join rfm.users as users on users.id = robots.updated_by
WHERE robot_models.name::varchar like '%RNR%' and robots.deleted_at is null
GROUP BY robots.id,robot_models.name,users.user_name
ORDER BY task_on_hand DESC LIMIT 2 OFFSET 0
and sorry for bad English!
Even though you are preloading, you are still required to explicitly use joins when filtering and ordering on columns on other tables. Preloading is used to eagerly load the data to map into your models, not to join tables.
Chain on something like this:
.Joins("LEFT JOIN rfm.robot_models AS robot_models ON robot_models.id = robots.robot_model_id")
I'm not positive if you can use the AS keyword using this technique, but if not, it should be easy enough to adjust your query accordingly.
I have a Angular5 based front-end which needs to show a list of persons. A similar list is shown at the back-end application. Both lists need to be sorted exactly the same. The back-end list is fetched via a query in MSSQL DB which uses an 'order by' clause like this :
select * from PERSON where GROUP=1 order by PERSON.LAST_NAME ASC, PERSON.INITIALS ASC, PERSON.PREFIX ASC, PERSON.FIRSTNAME ASC
On the frontend, my person model looks like :
export interface Person {
id?: number;
fullName?: string;
}
The fullName here is as per this format : [LastName, Initials Prefix FirstName] eg : Adams, Mr P John.
I am using this method to sort it :
public sortByName(aPersonArr: Person[]) {
aPersonArr.sort((p1, p2) => {
let name1 = p1.fullName;
let name2 = p2.fullName;
// If both names are blank, consider them equal, If one name is blank, place it at the last
if (!name1 && !name2) {
return 0;
} else if (name1 && !name2) {
return -1;
} else if (name2 && !name1) {
return 1;
}
name1 = name1.toLowerCase();
name2 = name2.toLowerCase();
if (name1 < name2) {
return -1;
}
if (name1 > name2) {
return 1;
}
return 0;
});
}
}
But the problem occurs when a person's fullName begins with a special character because SQL Query fetches the names in this order : (Showing only the lastNames here)
*Account
,Adams
.Alkin
+Account
-Adams
Whereas my typescript code sorts them like this : (Showing only the lastNames here)
*Account
+Account
,Adams
-Adams
.Alkin
The reason that I need to have this logic at frontend is that many a times my person list is dynamically prepared and needs to be sorted right away. Is there a way to know what exact logic is used by SQL query to compare strings, so that i can use the same in my sorting method.
I am using Linqpad and have odata connection setup.
I have a query as follows
QUERY1
void Main()
{var a = from cpuid in Computers
where cpuid.DnsHostName == "xyz"
select new {
ID = cpuid.TechnicalProductsHosted.Select (x => new { Id = x.Id }),
System_Dept = cpuid.SystemDepartment,
};
Console.WriteLine(a);
}
The output : it returns 4 ids but one department which is common among all four id's. When i query otherway round i.e
QUERY2
var a = from id in TechnicalProducts
where id.Id == "ID-15784"
select new
{System_Dept = id.Computers.Select(x => x.SystemDepartment),
Support_Team = id.Computers.Select(x => x.SupportTeam)
};
Console.WriteLine(a);
The output : 4 departments for the id. I wish to have the whole list of departments in the first case. How is it possible? In query 1 Can i take id as input for System Department and query it somehow?
the output samples
I have a basic schema
Post {
Labels: [
{ Text: "Mine" }
{ Text: "Incomplete" }
]
}
And I am querying raven, to ask for all posts with BOTH "Mine" and "Incomplete" labels.
queryable.Where(candidate => candidate.Labels.Any(label => label.Text == "Mine"))
.Where(candidate => candidate.Labels.Any(label => label.Text == "Incomplete"));
This results in a raven query (from Raven server console)
Query: (Labels,Text:Incomplete) AND (Labels,Text:Mine)
Time: 3 ms
Index: Temp/XWrlnFBeq8ENRd2SCCVqUQ==
Results: 0 returned out of 0 total.
Why is this? If I query for JUST containing "Incomplete", I get 1 result.
If I query for JUST containing "Mine", I get the same result - so WHY where I query for them both, I get 0 results?
EDIT:
Ok - so I got a little further. The 'automatically generated index' looks like this
from doc in docs.FeedAnnouncements
from docLabelsItem in ((IEnumerable<dynamic>)doc.Labels).DefaultIfEmpty()
select new { CreationDate = doc.CreationDate, Labels_Text = docLabelsItem.Text }
So, I THINK the query was basically testing the SAME label for 2 different values. Bad.
I changed it to this:
from doc in docs.FeedAnnouncements
from docLabelsItem1 in ((IEnumerable<dynamic>)doc.Labels).DefaultIfEmpty()
from docLabelsItem2 in ((IEnumerable<dynamic>)doc.Labels).DefaultIfEmpty()
select new { CreationDate = doc.CreationDate, Labels1_Text = docLabelsItem1.Text, Labels2_Text = docLabelsItem2.Text }
Now my query (in Raven Studio) Labels1_Text:Mine AND Labels2_Text:Incomplete WORKS!
But, how do I address these phantom fields (Labels1_Text and Labels2_Text) when querying from Linq?
Adam,
You got the reason right. The default index would generate 2 index entries, and your query is executing on a single index entry.
What you want is to either use intersection, or create your own index like this:
from doc in docs.FeedAnnouncements
select new { Labels_Text = doc.Labels.Select(x=>x.Text)}
And that would give you all the label's text in a single index entry, which you can execute a query on.
Example grouping by name of the zones:
def result = User.createCriteria().list{
projections {
roles {
zones{
groupProperty("name")
}
}
}
}
but suppose I want to get the "id" or other attributes. the fact is that i want the object on the representing the group and not the string "name".
result.each{ println it.customFuncion() }
"zones" is a hasMany attribute and then i cant group by itself. What should be done, but doesnt works:
def result = User.createCriteria().list{
projections {
roles {
groupProperty("zones")
}
}
}
Is that possible? Thank you guys!
use hql for complex queries:
def result = User.executeQuery("select u.id, zone.name from User as u inner join u.roles as role inner join role.zones as zone group by u.id, zone.name")
Then you can access the result columns as follows:
result.each { row -> row[0] // u.id } // or access via defined column name
Imagine that i do not know your real hasMany collection names.