I am trying to fetch soecific columns data from relational table but it is giving me null
$allConsignments = Consignment::query();
$allConsignments->select(['id','customer_reference'])->with('customers:name,id')->orderBy('id', 'desc')->limit(5000)->get();
When I don't use select() then it gives correct data .
like this
$allConsignments = Consignment::query();
$allConsignments->with('customers:name,id')->orderBy('id', 'desc')->limit(5000)->get()
it is working but I also need specific columns from Consignment Table. what could be the reason?
You can also do like this.
$allConsignments = Consignment::query();
$allConsignments::with('customers:name,id')->orderBy('id', 'desc')->limit(5000)->get(['id','customer_reference']);
Actually, I also need to select the foreign key column from the table on which relationship is based. for example in my case I have customer_id in consignment table so it should be like that
$allConsignments = Consignment::query();
$allConsignments->select('id','customer_reference','customer_id')->with('customers:name,id')->orderBy('id', 'desc')->limit(5000)->get();
I need to select customer_id as well
Related
I have two tables: requestgenerals and requestinformations.
The relationship between the 2 tables is:
requestinformations belongsTo requestgenerals
requestgenerals hasMany requestinformation.
Below are the tables:
requestgenerals table
and
requestinformations table
I tried the following: $requestgenerals = Requestgeneral::without('requestinformation')->get(); but I still get all the rows from the requestgenerals table instead of just two.Please assist
You should use this:
$requestgenerals = Requestgeneral::doesntHave('requestinformations')->get();
if you want to get all records that don't have related record in second table. Take a look at Eloquent documentation.
Use doesntHave for get data doestnt have requestinformations
$requestgenerals = Requestgeneral::doesntHave('requestinformations')->get();
For refernce refer this link
Example
can anyone help me turn the query in to Eloquent?
ALTER TABLE `invoices` DROP INDEX
`invoices_erp_id_origin_customer_id_unique`, ADD UNIQUE
`invoices_erp_id_origin_customer_id_unique`
(`erp_id`, `origin`, `customer_id`, `podtyp`)
Try this, eloquent only manipulates objects, to alter table use DB facade :)
DB::statement('ALTER TABLE `invoices` DROP INDEX
`invoices_erp_id_origin_customer_id_unique`, ADD UNIQUE
`invoices_erp_id_origin_customer_id_unique`
(`erp_id`, `origin`, `customer_id`, `podtyp`)');
I want to delete multiple rows from my post_tags table where post_id is given .
table structure post_tags is : post_id , tag_id , created_at , updated_at
I am able to do this operation with DB query builder , but i want to
delete multiple rows with single elequent command without using forloop
I don't know how to do this ?
You should try this:
$post_id = [1,2,3];
DB::table('post_tags')
->whereIn('id',$post_id)
->delete();
You can pass Model::destroy($ids) an array. Alternatively, loop the records you want to delete and call delete on each: $model->postTags->each->delete().
I created a table named- books and have a column in that by the title 'color' . Initially I have null values in the column 'color'. Now, when I run the following query :
alter table books modify color default 'blue';
schema is formed but on doing select *from books , all the values in column color are still null. What would be the correct query to fire?
here is the link:
http://sqlfiddle.com/#!4/f4210/1
Of course. Alter table just changes the table structure but not the content. New entries will get the default.
To update the existing values run a sql-update query like:
update books set color='blue' where colore is null;
If you now inserting into table then only will come with default values. This statement don't know about previous contents of this table. In non technical language, you are telling oracle to do so now on-wards. This statement will not perform check to old values.
alter is ok for the next values to be inserted: try to insert lines without specifying a value for column color, value should be blue.
But this does not work for existing values, for which you just need an update:
update books set color = 'blue';
Hi this query will be used to add column with default value in existing table in oracle.
alter table <table_name> add <column_name> <contraint> default <default_value> not null;
example:
alter table books add record_status number(1,0) default 1 not null;
alter table books add color varchar(20) default 'blue' not null;
I have a table in oracle db which has a unique index composed of two columns (id and valid_from). The column valid_from is of type timestamps with time zone.
When I query the SYS.USER_IND_COLUMNS to see which columns my table is using as unique index, I can not see the name of the valid_from column but instead I see smth like SYS_NC00027$.
Is there any possibility that I can display the name valid_from rather than SYS_NC00027$. ?
Apparently Oracle creates a function based index for timestamp with time zone columns.
The definition of them can be found in the view ALL_IND_EXPRESSIONS
Something like this should get you started:
select ic.index_name,
ic.column_name,
ie.column_expression
from all_ind_columns ic
left join all_ind_expressions ie
on ie.index_owner = ic.index_owner
and ie.index_name = ic.index_name
and ie.column_position = ic.column_position
where ic.table_name = 'FOO';
Unfortunately column_expression is a (deprecated) LONG column and cannot easily be used in a coalesce() or nvl() function.
Use the below to verify the col info.
select column_name,virtual_column,hidden_column,data_default from user_tab_cols where table_name='EMP';