How can I get the first name and last name from the table User through table Friend which is referenced by the user_id with the condition of user_id 5 and status is pending and place it in a each loop but i also need the contents of friend controller in rails. Thank a lot for the help
Controller
#add = Friend.where(user_id: 5, status: 'Pending')
User Database
+-----------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------------+--------------+------+-----+---------+----------------+
| id | int | NO | PRI | NULL | auto_increment |
| first_name | text | YES | | NULL | |
| last_name | text | YES | | NULL | |
| email | text | YES | | NULL | |
| contact_number | varchar | YES | | NULL | |
| birth_date | date | YES | | NULL | |
| created_at | datetime | NO | | NULL | |
| updated_at | datetime | NO | | NULL | |
Friend
+--------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+--------------+--------------+------+-----+---------+----------------+
| id | int | NO | PRI | NULL | auto_increment |
| request_date | date | YES | | NULL | |
| reason | text | YES | | NULL | |
| status | varchar(255) | YES | | NULL | |
| userid | int | YES | MUL | NULL | |
How about this:
#add = Friend.joins(:user).select("users.first_name, users.last_name").where(user_id: 5, status: 'Pending')
Seems like youre already fetching the id of the user, stored in the user_id field. In order to get the associated user, i would do
#user = User.find(#add.id)
This retrieves the user based on the id you pass, and from there you can do stuff like
#user.first_name
to get the values
All you need to do in Friend model belongs_to user and then
#add =Friend.where("user_id = ? AND status = ?", 5,"Pending")
and
<#add.each do |s|>
<%s.user.first_name%>
<%=<%s.user.last_name%>
// and so on..
<%end%>
Related
I have this simple scope
scope :has_video_link,
-> { where.not(video_link: nil) }
I use it like so in my controller
#videos = Message .featured
.includes(:user, :company, :forum, :topic)
.published
.unremoved
.approved
.has_video_link
.order(created_at: :desc)
.paginate(
page: page,
per_page: limit)
Which I call like so
before_action only: :index
skip_before_action :verify_authenticity_token
def index
self.page_title = 'Home'
fetch_videos
end
That works just fine, and my page loads in under a second on prod no problem. My issue is I have an ajax request that calls this
def videos
fetch_videos
respond_to do |format|
format.js
end
end
On dev this works great but in prod this takes over 60 seconds....
First image is from the first times its called (4ms)
2nd image is the ajax call 69000ms...
Any ideas? How do i fix this?? Thank you!!
edit: here is the explain
EXPLAIN for: SELECT `messages`.* FROM `messages` WHERE `messages`.`is_featured` = 1 AND (messages.created_at<='2021-06-04 12:36:22.241601') AND `messages`.`is_removed` = 0 AND `messages`.`is_approved` = 1 AND (`messages`.`video_link` IS NOT NULL) ORDER BY `messages`.`created_at` DESC LIMIT 5 OFFSET 0
+----+-------------+----------+------------+-------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+---------------------------------------------+---------+------+------+----------+------------------------------------+
| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
+----+-------------+----------+------------+-------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+---------------------------------------------+---------+------+------+----------+------------------------------------+
| 1 | SIMPLE | messages | NULL | range | index_messages_on_is_removed_and_user_id_and_created_at,index_messages_on_is_removed_and_message_type_and_created_at,index_messages_on_is_removed_company_id_type_created_at,index_messages_on_is_removed_company_id_created_at_id_user_id,index_messages_on_is_removed_and_created_at,index_messages_on_is_removed_company_id_created_at_rating_count,index_messages_on_is_removed_company_id_user_role_created_at,index_messages_on_is_removed_and_company_id_and_rating_total,index_messages_on_is_removed_and_forum_id_and_created_at,index_messages_on_is_approved,index_messages_on_is_removed_and_is_approved | index_messages_on_is_removed_and_created_at | 7 | NULL | 3470 | 9.0 | Using index condition; Using where |
+----+-------------+----------+------------+-------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+---------------------------------------------+---------+------+------+----------+------------------------------------+
1 row in set (0.00 sec)
EXPLAIN for: SELECT `users`.* FROM `users` WHERE `users`.`id` = 594568
+----+-------------+-------+------------+-------+---------------+---------+---------+-------+------+----------+-------+
| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
+----+-------------+-------+------------+-------+---------------+---------+---------+-------+------+----------+-------+
| 1 | SIMPLE | users | NULL | const | PRIMARY | PRIMARY | 4 | const | 1 | 100.0 | NULL |
+----+-------------+-------+------------+-------+---------------+---------+---------+-------+------+----------+-------+
1 row in set (0.00 sec)
EXPLAIN for: SELECT `companies`.* FROM `companies` WHERE `companies`.`id` IN (564013, 562440)
+----+-------------+-----------+------------+-------+---------------+---------+---------+------+------+----------+-------------+
| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
+----+-------------+-----------+------------+-------+---------------+---------+---------+------+------+----------+-------------+
| 1 | SIMPLE | companies | NULL | range | PRIMARY | PRIMARY | 4 | NULL | 2 | 100.0 | Using where |
+----+-------------+-----------+------------+-------+---------------+---------+---------+------+------+----------+-------------+
1 row in set (0.01 sec)
EXPLAIN for: SELECT `forums`.* FROM `forums` WHERE `forums`.`id` IN (12224, 7759)
+----+-------------+--------+------------+-------+---------------+---------+---------+------+------+----------+-------------+
| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
+----+-------------+--------+------------+-------+---------------+---------+---------+------+------+----------+-------------+
| 1 | SIMPLE | forums | NULL | range | PRIMARY | PRIMARY | 4 | NULL | 2 | 100.0 | Using where |
+----+-------------+--------+------------+-------+---------------+---------+---------+------+------+----------+-------------+
1 row in set (0.00 sec)
EXPLAIN for: SELECT `topics`.* FROM `topics` WHERE `topics`.`id` IN (684474, 684473, 684472, 684470, 684467)
+----+-------------+--------+------------+-------+---------------+---------+---------+------+------+----------+-------------+
| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
+----+-------------+--------+------------+-------+---------------+---------+---------+------+------+----------+-------------+
| 1 | SIMPLE | topics | NULL | range | PRIMARY | PRIMARY | 4 | NULL | 5 | 100.0 | Using where |
+----+-------------+--------+------------+-------+---------------+---------+---------+------+------+----------+-------------+
1 row in set (0.00 sec)
Solved this issue. All I had to do was simply index video_links and that fixed my issue right up!
I want to manage the rates of a product in multi-currency and keep historic of currency rates.
So onetomany relation:
A Rates can have many CurrencyRate.
A manyto many relation:
Many currencyRate have many currencies.
RATES :
+-----------------+----------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------------+----------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| rate | double | YES | | NULL | |
| timeStamp | datetime | NO | | NULL | |
| currencyRate_id | int(11) | YES | MUL | NULL | |
+-----------------+----------+------+-----+---------+----------------+
CURRENCY RATES
+-----------+----------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------+----------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| rate | double | NO | | NULL | |
| timeStamp | datetime | NO | | NULL | |
+-----------+----------+------+-----+---------+----------------+
currencyrateshascurrencies (manytomany join table)
+-----------------+---------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-----------------+---------+------+-----+---------+-------+
| currency_id | int(11) | NO | PRI | NULL | |
| currencyRate_id | int(11) | NO | PRI | NULL | |
+-----------------+---------+------+-----+---------+-------+
currencies
+-------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------------+--------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | NO | UNI | NULL | |
| abreviation | varchar(5) | NO | UNI | NULL | |
+-------------+--------------+------+-----+---------+----------------+
I want to generate a form from all of this.
The html form would get all available currencies with a text field to indicate the CurrencyRate.
Ex :
USD <input type="text">
EUR <input type="text">
CNY <input type="text">
...
I saw the documentation on Symfony about manytomany form. But mine is more complex with an additional onetomany relation and text field. I am totaly lost.
Thanks if you can put me on the right direction.
Best regards,
Pierre
I found the response :
First I needed to correct my Schema which didn't need a ManytoMany relation :
Rates :
+-----------+----------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------+----------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| rate | double | YES | | NULL | |
| timeStamp | datetime | NO | | NULL | |
+-----------+----------+------+-----+---------+----------------+
CURRENCY RATES
+-------------+---------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------------+---------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| ratio | double | NO | | NULL | |
| currency_id | int(11) | YES | MUL | NULL | |
| Rate_id | int(11) | YES | MUL | NULL | |
+-------------+---------+------+-----+---------+----------------+
Currencies
+-------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------------+--------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| name | varchar(255) | NO | UNI | NULL | |
| abreviation | varchar(5) | NO | UNI | NULL | |
+-------------+--------------+------+-----+---------+----------------+
Then One Form Type
class CurrencyRateType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add('currency',EntityType::class, array(
'class'=>'AppBundle:Currencies',
'choice_label' => 'abreviation',
'disabled' => true,
))
->add('ratio', TextType::class);
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array(
'data_class' => CurrencyRates::class,
));
}
}
which is embedded in the final form type :
class RateType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder ->add('rate')
->add('CurrencyRate', CollectionType::class, array(
'entry_type' => CurrencyRateType::class,
'entry_options' => array('label' => false))
)
->add('save', SubmitType::class, array('label' => 'create'));
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array(
'data_class' => Rates::class,
));
}
}
What would be a good approach to report of all the dates a name occurs in a list? Can this be done with a single array formula?
Example (column A and B are input, columns C through G are to be auto-generated):
| A | B | C | D | E | F | G |
+---------+--------+--------+---------+---------+---------+---------+
| Episode | Stars | Name | Date | Date | Date | Date |
+---------+--------+--------+---------+---------+---------+---------+
| 7/24/15 | Bart | Bart | 7/24/15 | 7/18/15 | 8/15/15 | 3/29/15 |
| 8/09/15 | Maggie | Homer | 1/10/15 | | | |
| 7/24/15 | Marge | Lisa | 7/20/15 | 6/04/15 | | |
| 7/18/15 | Bart | Maggie | 8/09/15 | | | |
| 1/10/15 | Homer | Marge | 7/24/15 | | | |
| 8/15/15 | Bart | | | | | |
| 7/20/15 | Lisa | | | | | |
| 6/04/15 | Lisa | | | | | |
| 3/29/15 | Bart | | | | | |
|^^^^^^|
| |
| |
| (o)(o)
# _)
| ,___| - Thanks Dude!
| /
/___\
/ \
I don't think this is easily possible in a single arrayformula. However, as an alternative you could try this formula in cell C2:
=SORT(UNIQUE(QUERY(FILTER(B$2:B,LEN(B$2:B)))),1,1)
Then try this formula in cell D2 and drag down:
=TRANSPOSE(QUERY(A$2:B,"select A where B='"&C2&"'"))
See this example sheet to see it working: https://goo.gl/0u41u5
My before_save doesn't update the verified_date field.
Why is that? Other processes can update the field ok.
Model:
class Link < ActiveRecord::Base
belongs_to :group
validates_presence_of :url_address
validates_presence_of :group_id
validates_size_of :version_number, :maximum => 10 #, :allow_nil => true
before_save :verify_this_link
acts_as_list
...
def verify_this_link
verified_date = Time.now
end
end
mysql> describe links;
+----------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+----------------+--------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| url_address | varchar(255) | NO | | NULL | |
| alt_text | varchar(255) | YES | | NULL | |
| group_id | int(11) | YES | | NULL | |
| position | int(11) | YES | | NULL | |
| created_at | datetime | YES | | NULL | |
| updated_at | datetime | YES | | NULL | |
| version_number | varchar(255) | YES | | NULL | |
| content_date | date | YES | | NULL | |
| verified_date | date | YES | | NULL | |
+----------------+--------------+------+-----+---------+----------------+
mysql> select id, substr(url_address,1,20),
verified_date from links where id > 350;
+-----+--------------------------+---------------+
| id | substr(url_address,1,20) | verified_date |
+-----+--------------------------+---------------+
| 351 | http://magicmodels.r | NULL |
| 352 | http://jsbin.com/#ja | 2014-07-12 |
| 353 | http://www.javascrip | 2014-07-12 |
| 354 | http://www.test.com | 2014-08-08 |
| 357 | http://www.t5.com | 2014-07-12 |
+-----+--------------------------+---------------+
5 rows in set (0.00 sec)
Try:
def verify_this_link
self.verified_date = Time.now
end
Reference https://stackoverflow.com/a/6326323/252671
I have seen this behaviour on a few different locations lets say:
class fruits {
static hasMany=[preapples:Apples, apples: Apples, postapples: Apples ]
}
static mapping = {
preapples cascade: 'lock'
apples cascade: 'lock'
postapples cascade: 'lock'
}
static constraints = {
preapples nullable:true
apples nullable:true
postapples nullable:true
}
When the views are generated if on fruits I select many apples apple1 apple2 etc
If I return now and change from apple1 + apple2 to just apple1 - everything is ok
If I deselect all as in if there was only 1 selected and I choose ctrl to unhighlight it - which clearly shows nothing has been selected - when I submit form the value is not actually removed.
Is this something to do with nullable ? or am I missing something obvious
I have added nullable true as suggested which has made no difference from selecting values then unselecting it.
I have also modified actual sql table structure (naming to apples and fruits but before making change / dropping table and after making change having it recreate table - there was no difference to nullable (already nullable)
mysql> describe fruits_apples;
+-----------------------------------+------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-----------------------------------+------------+------+-----+---------+-------+
| fruits_apples_id | bigint(20) | YES | MUL | NULL | |
| apples_id | bigint(20) | YES | MUL | NULL | |
| fruits_postapples_id | bigint(20) | YES | MUL | NULL | |
| fruits_preapples_id | bigint(20) | YES | MUL | NULL | |
|
mysql> describe fruits_shell_scripts;
+-----------------------------------+------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-----------------------------------+------------+------+-----+---------+-------+
| fruits_apples_id | bigint(20) | YES | MUL | NULL | |
| apples_id | bigint(20) | YES | MUL | NULL | |
| fruits_postapples_id | bigint(20) | YES | MUL | NULL | |
| fruits_preapples_id | bigint(20) | YES | MUL | NULL | |
+-----------------------------------+------------+------+-----+---------+-------+
Regards