I am trying to get a related field value from database, but it showing column 'column_name' does not exist.
When i try to find out the value of product_id or using join to find the common data between sale.order and product.product Model . but it showing column 'column_name' does not exist.
In sale.order model the field defination is like
product_id = fields.Many2one('product.product', related='order_line.product_id', string='Product')
But when i try to join two table like below code to fetch all data as per product, like below code.
select coalesce(p.name,'Unassigned Product'), count(*) from sale_order o left join product_product p on o.product_id = p.id where o.state = 'sale' group by p.name;
It showing below error,
column o.product_id does not exist
LINE 1: ... from sale_order o left join product_product p on o.product_...
When i try to get data from sale_order table like below code.
select product_id from sale_order;
It showing below error.
column "product_id" does not exist
Can any one help me to get that value.
To access a related field from database , you have to use the store=True , keyword.
Rewrite your field definition as,
product_id = fields.Many2one('product.product', related='order_line.product_id', string='Product', store=True)
and uninstall and install the module.
Related
I am using node-postgres to select and insert data into postgres. I have some column of jsonb type which I am fetching from db by using below query
getEmployee() {
return SELECT empId, empData FROM employee WHERE empId = $1;
}
where empData is jsonb type of column. Below is code snippet which use above query.
const employee = await DBService.query(pgObj.getEmployee(), [empId]);
when I am trying to get empData from employee I am getting empty value.
const { empData } = employee;
I am not sure what I am missing here. Is this the correct way to fetch josnb column of postgreas db in nodejs?
Are you sure empdata is even populated, in the database? Maybe it's empty.
Also, what are the jsonb fields of empdata?
To get the actual sub-fields of empdata, you need the ->> operator. eg:
get the whole json object as text
SELECT empId, empData::text
FROM employee where empId = $1
get individual attributes
SELECT empId, empData->>annual_pay as salary
FROM employee WHERE empId = $1;
etc...
You can also try
Have a look here: https://kb.objectrocket.com/postgresql/how-to-query-a-postgres-jsonb-column-1433
I haven't tried these out, I'm not in front of postgres right now.
i have i would like to create a join over several tables.
table login : I would like to retrieve all the data from login
table logging : calculating the Nb_of_sessions for each db & for each a specific event type by user
table meeting : calculating the Nb_of_meetings for each db & for each user
table live : calculating the Nb_of_live for each db & for each user
I have those queries with the right results :
SELECT db.id,_id as userid,firstname,lastname
FROM "logins"."login",
UNNEST(dbs) AS a1 (db)
SELECT dbid,userid,count(distinct(sessionid)) as no_of_visits,
array_join(array_agg(value.from_url),',') as from_url
FROM "loggings"."logging"
where event='url_event'
group by db.id,userid;
SELECT dbid,userid AS userid,count(*) as nb_interviews,
array_join(array_agg(interviewer),',') as interviewer
FROM "meetings"."meeting"
group by dbid,userid;
SELECT dbid,r1.user._id AS userid,count(_id) as nb_chat
FROM "lives"."live",
UNNEST(users) AS r1 (user)
group by dbid,r1.user._id;
But when i begin to try put it all together, it seems i retrieve bad data (i have only on db retrieved) and it seems not efficient.
select a1.db.id,a._id as userid,a.firstname,a.lastname,count(rl._id) as nb_chat
FROM
"logins"."login" a,
"loggings"."logging" b,
"meetings"."meeting" c,
"lives"."live" d,
UNNEST(dbs) AS a1 (db),
UNNEST(users) AS r1 (user)
where a._id = b.userid AND a._id = c.userid AND a._id = r1.user._id
group by 1,2,3,4
Do you have an idea ?
Regards.
The easiest way is to work with with to structure the subquery and then reference them.
with parameter reference:
You can use WITH to flatten nested queries, or to simplify subqueries.
The WITH clause precedes the SELECT list in a query and defines one or
more subqueries for use within the SELECT query.
Each subquery defines a temporary table, similar to a view definition,
which you can reference in the FROM clause. The tables are used only
when the query runs.
Since you already have working sub queries, the following should work:
with logins as
(
SELECT db.id,_id as userid,firstname,lastname
FROM "logins"."login",
UNNEST(dbs) AS a1 (db)
)
,visits as
(
SELECT dbid,userid,count(distinct(sessionid)) as no_of_visits,
array_join(array_agg(value.from_url),',') as from_url
FROM "loggings"."logging"
where event='url_event'
group by db.id,userid
)
,meetings as
(
SELECT dbid,userid AS userid,count(*) as nb_interviews,
array_join(array_agg(interviewer),',') as interviewer
FROM "meetings"."meeting"
group by dbid,userid
)
,chats as
(
SELECT dbid,r1.user._id AS userid,count(_id) as nb_chat
FROM "lives"."live",
UNNEST(users) AS r1 (user)
group by dbid,r1.user._id
)
select *
from logins l
left join visits v
on l.dbid = v.dbid
and l.userid = v.userid
left join meetings m
on l.dbid = m.dbid
and l.userid = m.userid
left join chats c
on l.dbid = c.dbid
and l.userid = c.userid;
My requirement is to get the list of customers who have ordered an old product.
Here for the old product, we are using an attribute "endproduct".
I am able to get all the customers who have placed orders. BUT I don't know how to create a query to get products from Order Model.
I have run this query :
SELECT distinct {c:uid},{aeo:product} from
{customer as c JOIN order as o on {c:pk}={o:user}JOIN AbstractOrder as ao on {o:pk}={ao:pk} JOIN AbstractOrderEntry as aeo on {ao:pk}={aeo:pk}}
Because AbstractOrderEntryModel has a product attribute.
Try like
SELECT
distinct {u:uid},{p:name}
FROM { Order AS o JOIN OrderEntry AS oe ON {o.pk} = {oe.order} JOIN Product AS p ON {p.pk} = {oe.product} and {p.endproduct} = '1' JOIN User AS u ON {o.user} = {u.pk}}
Change endproduct condition as per your requirement.
Try below query, it should give expected results.
select {c.uid},{p.code}
from {Customer as c}, {Order as o}, {Product as p}, {AbstractOrderEntry as ao}
where {o.user} = {c.pk} and {o.pk} = {ao.order} and {ao.product} = {p.pk}
I tried to translate SQL "NOT IN" expression to LINQ, and I found that I should use the "Contains" option.
I have 2 tables:
ProductsGroups Products
-------------- ---------
id product_id
product_id product_name
My queries looks like this:
var innerQuery = from pg in Session.Query<ProductsGroups>
select pg.product_id;
var Query = from p in Session.Query<Products>
where !innerQuery.Contains(p.product_id)
select new {p.product_id, p.product_name};
But the sql that nHibernate generates is wrong:
select p.product_id, p.product_name
from Products p
where not (exists (select product_id
from ProductsGroups pg
where p.product_id = pg.id))
The "where" clause is not on the right field, it compares product_id to progucts group id.
Does anybody knows how can I solve it?
The solution that I found for meanwhile is to convert first query to list, and then
use this list in second query:
var innerQuery = (from pg .....).ToList();
Then, the nHibernate translates the "Contains" expression to "NOT IN", as I want:
select p.product_id, p.product_name
from Products p
where not (p.product_id in (1,2,3,4))
I am not sure, but I think you're running into a problem b/c contains determines if an element is in the collection by "using the default equality comparer." (MS documentation) I assume your productgroup mapping specifies it's Id as the Id property. So from nHibernate's perspective that is the value to use to determine equality.
I want to perform a simple join on two tables (BusinessUnit and UserBusinessUnit), so I can get a list of all BusinessUnits allocated to a given user.
The first attempt works, but there's no override of Select which allows me to restrict the columns returned (I get all columns from both tables):
var db = new KensDB();
SqlQuery query = db.Select
.From<BusinessUnit>()
.InnerJoin<UserBusinessUnit>( BusinessUnitTable.IdColumn, UserBusinessUnitTable.BusinessUnitIdColumn )
.Where( BusinessUnitTable.RecordStatusColumn ).IsEqualTo( 1 )
.And( UserBusinessUnitTable.UserIdColumn ).IsEqualTo( userId );
The second attept allows the column name restriction, but the generated sql contains pluralised table names (?)
SqlQuery query = new Select( new string[] { BusinessUnitTable.IdColumn, BusinessUnitTable.NameColumn } )
.From<BusinessUnit>()
.InnerJoin<UserBusinessUnit>( BusinessUnitTable.IdColumn, UserBusinessUnitTable.BusinessUnitIdColumn )
.Where( BusinessUnitTable.RecordStatusColumn ).IsEqualTo( 1 )
.And( UserBusinessUnitTable.UserIdColumn ).IsEqualTo( userId );
Produces...
SELECT [BusinessUnits].[Id], [BusinessUnits].[Name]
FROM [BusinessUnits]
INNER JOIN [UserBusinessUnits]
ON [BusinessUnits].[Id] = [UserBusinessUnits].[BusinessUnitId]
WHERE [BusinessUnits].[RecordStatus] = #0
AND [UserBusinessUnits].[UserId] = #1
So, two questions:
- How do I restrict the columns returned in method 1?
- Why does method 2 pluralise the column names in the generated SQL (and can I get round this?)
I'm using 3.0.0.3...
So far my experience with 3.0.0.3 suggests that this is not possible yet with the query tool, although it is with version 2.
I think the preferred method (so far) with version 3 is to use a linq query with something like:
var busUnits = from b in BusinessUnit.All()
join u in UserBusinessUnit.All() on b.Id equals u.BusinessUnitId
select b;
I ran into the pluralized table names myself, but it was because I'd only re-run one template after making schema changes.
Once I re-ran all the templates, the plural table names went away.
Try re-running all 4 templates and see if that solves it for you.