The query below represents what I am trying to do, I need to pull in a list of blog_posts and also join with a users table.
What it is also doing is pulling in a random 'picture_filename' from blog_updates_pictures. It needs blog_updates as a join to reference the blog_update_id.
What I'd like to do now is also COUNT the number of blog_updates for each blog_post. I think this is a subquery but every implementation fails. It would also be good to have the count accept arguments (ie. blog_updates where date = ?). Also, there may be no updates or pictures to a blog_post.
$select = $db->select ();
$select->from ( array ('b' => 'blog_posts' ), array('headline', 'date_created'));
$select->join ( array ('u' => 'users' ), 'u.user_id = b.user_id', array ( 'email' ) );
$select->joinLeft ( array ('bu' => 'blog_updates' ), 'bu.blog_id = b.blog_id', array () );
$select->joinLeft ( array ('bup' => 'blog_updates_pictures' ), 'bu.blog_update_id = bup.blog_update_id', array ('picture_filename' ) );
Can someone show me the way?
Thanks
What I'd like to do now is also COUNT the number of blog_updates for each blog_post.
You can achieve that using aggregation - use GROUP BY bu.blog_id, and as additional column COUNT(bu.blog_id) AS blog_updates_count. It should work.
Create subselects as:
$subselect = $db->select()
->from(
array ('bu' => 'blog_updates' ),
array(
'blog_id',
'updates' => 'count(*)'
)
)
->group("bu.blog_id");
And then join the $subselect with your main $select as:
$select->join(
array( 't' => $subselect),
"t.blog_id = b.blog_id",
array( 'updates' )
);
If we had the table structure you might get a more complete answer
Related
Here I want to join two table with comma separated ids
For example my data is like:
[Restaurant] => Array
(
[RST_ID] => 171
[RST_NAME] => oneone
[RST_IMAGE] =>
[RST_CAT_ID] => 2,4,6
[RST_CT_ID] => 27
[RST_IS_TOP] => 3
[RST_QR_CODE] =>
[RST_CREATED_DATE] => 1394536725
[RST_MODIFIED_DATE] => 1394536725
[RST_STATUS] => 1
)
[Category] => Array
(
[CAT_ID] => 2
[CAT_NAME] => Vegetarian
[CAT_CREATED_DATE] => 1375175962
[CAT_MODIFIED_DATE] => 1375175962
[CAT_STATUS] => 1
)
My Model Code:
var $belongsTo = array(
'Category' => array(
'className' => 'Category',
'foreignKey' => 'RST_CAT_ID',
'conditions' => array('Category.CAT_ID IN ( Restaurant.RST_CAT_ID)')
)
);
Real Query:
SELECT
`Restaurant`.`RST_ID`, `Restaurant`.`RST_NAME`, `Restaurant`.`RST_IMAGE`,
`Restaurant`.`RST_CAT_ID`, `Restaurant`.`RST_CT_ID`, `Restaurant`.`RST_IS_TOP`,
`Restaurant`.`RST_QR_CODE`, `Restaurant`.`RST_CREATED_DATE`,
`Restaurant`.`RST_MODIFIED_DATE`, `Restaurant`.`RST_STATUS`,
`Category`.`CAT_ID`, `Category`.`CAT_NAME`, `Category`.`CAT_CREATED_DATE`,
`Category`.`CAT_MODIFIED_DATE`, `Category`.`CAT_STATUS`, `City`.`CT_ID`,
`City`.`CT_NAME`, `City`.`CT_CREATED_DATE`, `City`.`CT_MODIFIED_DATE`,
`City`.`CT_STATUS`
FROM `dailybit_dailybites`.`restaurant` AS `Restaurant`
LEFT JOIN `dailybit_dailybites`.`category` AS `Category`
ON (`Restaurant`.`RST_CAT_ID` = `Category`.`CAT_ID`
AND `Category`.`CAT_ID` IN ( `Restaurant`.`RST_CAT_ID`))
LEFT JOIN `dailybit_dailybites`.`city` AS `City`
ON (`Restaurant`.`RST_CT_ID` = `City`.`CT_ID`)
WHERE 1 = 1
So what’s the solution here?
It's giving me just one category data that for first id only.
First have a look at this question: MySQL search in comma list
As you can see the belongsTo query is just generating a join on the single id, CakePHP by default doesn't respect this special case. You will have to alter your query and pass all the ids manually, but your DB design is bad and it doesn't follow the CakePHP conventions at all.
How do you prevent duplicates (which would waste space)
How do you remove a given value (Requires custom function, leading to possibility of errors?
How do you respond to performance issues as the size of my tables increase?
Instead of changing the query you should change this awkward DB design. You want to use HABTM here and a join table: Restaurant hasAndBelongsToMany Categoryy.
restaurants <-> restaurants_categories <-> categories
If you insist on using this bad DB design you'll have to use bindModel() and set the conditions manually:
'conditions' => array('FIND_IN_SET (Category.CAT_ID, ' . $listOfIds. ')')
I haven't tested this, try it yourself, see FIND_IN_SET() vs IN()
You'll have to have another method that gets you all the ids you want here before. Like I said, this is ineffectice and bad design.
You have to set your foreign Key false and find_in_set condition
var $belongsTo = array(
'Category' => array(
'className' => 'Category',
'foreignKey' => false,
'conditions' => array('FIND_IN_SET(Category.CAT_ID,Restaurant.RST_CAT_ID)')
)
);
// you can pass an array at the place of 'Restaurant.RST_CAT_ID'
OK, another cake question from me.
I have rather a complex table structure with quite a few joins. Here's the jist of it:
So, in summary:
RiskCategory $hasMany Client [Client $belongsTo RiskCategory]
Client $hasMany Account [Account $belongsTo Client]
Account $hasMany Holding [Holding $belongsTo Account]
In my RiskCategory model I want to run a query that basically returns the sum of the holdings in each riskCategory id, grouped by date. There's a few other conditions but here is what I've put together:
$findParams = array(
'recursive' => 4,
'fields' => array(
'Holding.holding_date',
'SUM(Holding.value) AS risk_category_value'
),
'group' => array('Holding.holding_date'),
'order' => 'Holding.holding_date ASC'
);
$findParams['conditions'] = array(
'Client.active' => true,
'Client.model' => true,
'Client.currency' => 'GBP',
'OR' => array(
'Holding.holding_date' => $this->end_date,
array(
'Holding.holding_date = LAST_DAY(Holding.holding_date)',
'MONTH(Holding.holding_date)' => array(3,6,9,12)
)
)
);
$valuations = $this->Client->Account->Holding->find( 'all', $findParams );
When I run the above cake is giving me an error saying various fields are not present in the query. The raw query created is as follows:
SELECT `Holding`.`holding_date`,
Sum(`Holding`.`value`) AS risk_category_value
FROM `ips_client_db`.`holdings` AS `Holding`
LEFT JOIN `ips_client_db`.`accounts` AS `Account`
ON ( `Holding`.`account_id` = `Account`.`id` )
LEFT JOIN `ips_client_db`.`sedols` AS `Sedol`
ON ( `Holding`.`sedols_id` = `Sedol`.`id` )
WHERE `client`.`active` = '1'
AND `client`.`model` = '1'
AND `client`.`currency` = 'GBP'
AND ( ( `Holding`.`holding_date` = '2013-10-01' )
OR (( ( `Holding`.`holding_date` = Last_day(
`Holding`.`holding_date`) )
AND ( Month(`Holding`.`holding_date`) IN ( 3, 6, 9, 12 ) ) )
) )
GROUP BY `Holding`.`holding_date`
ORDER BY `Holding`.`holding_date` ASC
It looks as though cake is not doing all the joins. It is only joining Account to Holding and then Holding to Sedol (which is another joined table in the database but is not needed for this query so I've omitted it from the diagram)
Why are the joins not being made properly and how to acheive this? I'd like to avoid writing a raw statement if possible.
EDIT: The joins should be as follows:
...
FROM risk_categories
LEFT JOIN ((clients
LEFT JOIN accounts
ON clients.id = accounts.client_id)
LEFT JOIN holdings
ON accounts.id = holdings.account_id)
ON risk_categories.id = clients.risk_category_id
...
CakePHP does not perform deep joins for associations that are more than 1 level deep. That is why you're getting an error for references to the Client table in the conditions.
For these types of problems it's easier to use the Containable behavior. I usually add this behavior to my AppModel as the default handler for associations.
Containable allows you to define the associations (only those already defined) with their fields and conditions as part of the find operation. This is done by adding a new contain key in the find parameters. Below I've taking a guess at what you might need.
$findParams = array(
'fields' => array(
'Holding.holding_date',
'SUM(Holding.value) AS risk_category_value'
),
'conditions'=>array(
'OR' => array(
'Holding.holding_date' => $this->end_date,
array(
'Holding.holding_date = LAST_DAY(Holding.holding_date)',
'MONTH(Holding.holding_date)' => array(3,6,9,12)
)
)
),
'group' => array('Holding.holding_date'),
'order' => 'Holding.holding_date ASC',
'contain'=>array(
'Account'=>array(
'Client'=>array(
'RiskCategory',
'conditions'=>array(
'Client.active' => true,
'Client.model' => true,
'Client.currency' => 'GBP',
)
)
)
)
);
$valuations = $this->Client->Account->Holding->find( 'all', $findParams );
So, I have three tables. Movies, movies_genres and genres. I want to get a movie by its Id, and also join its genres in the result. I managed to join the results, but it doesn't display as i want it to. I'm not sure if what I'm asking is possible.
This is my query:
SELECT `movies`.*, GROUP_CONCAT(genres.id) AS genre_id, GROUP_CONCAT(genres.name) AS genre_name
FROM (`movies`)
INNER JOIN `movies_genres`
ON `movies_genres`.`movie_id` = `movies`.`id`
INNER JOIN `genres`
ON `genres`.`id` = `movies_genres`.`genre_id` WHERE `movies`.`id` = 19908
GROUP BY `movies`.`id`
The query was generated by Codeigniters Active Record class, here is the Codeigniter code if that helps:
$this->db->select('movies.*, GROUP_CONCAT(genres.id) AS genre_id, GROUP_CONCAT(genres.name) AS genre_name');
$this->db->from('movies');
$this->db->where('movies.id', $movie_id);
$this->db->join('movies_genres', 'movies_genres.movie_id = movies.id', 'inner');
$this->db->join('genres', 'genres.id = movies_genres.genre_id', 'inner');
$this->db->group_by('movies.id');
Here is the result i'm currently getting:
Array
(
[id] => 19908
[movie_title] => Zombieland
[overview] => An easily spooked guy...
[genre_id] => 28,12,35,27
[genre_name] => Action,Adventure,Comedy,Horror
)
And this is what I want:
Array
(
[id] => 19908
[movie_title] => Zombieland
[overview] => An easily spooked guy...
[genres] => array(
0 => array(
'id' => 28,
'name' => Action
),
1 => array(
'id' => 12,
'name' => Adventure
),
1 => array(
'id' => 35,
'name' => Comedy
),
1 => array(
'id' => 27,
'name' => Horror
)
)
)
Is this possible, and if so, how?
The query you listed will have n rows (where n = # of movies) whereas the query it seems you want will have many more rows (# of movie_genre's entries). You're probably better off leaving that query as it is, and doing some post processing.
Consider:
After you get it, just run your result (e.g. $result) array through something like:
foreach($result as &$row)
{
// Split over commas
$gi_elements = explode(',', $row['genre_id']);
$gn_elements = explode(',', $row['genre_name']);
// Build genre
$row['genre'] = array();
for($i=0; $i<count($gi_elements); $i++)
{
$row['genre'][] = array('id' => $gi_elements[$i], 'name' => $gn_elements[$i]);
}
// Cleanup
unset($row['genre_id']);
unset($row['genre_name']);
}
Afterwards, $results will look exactly as you wish without extra database work.
EDIT: Fixed some typos.
I'm trying to join two associative arrays together based on an entry_id key. Both arrays come from individual database resources, the first stores entry titles, the second stores entry authors, the key=>value pairs are as follows:
array (
'entry_id' => 1,
'title' => 'Test Entry'
)
array (
'entry_id' => 1,
'author_id' => 2
I'm trying to achieve an array structure like:
array (
'entry_id' => 1,
'author_id' => 2,
'title' => 'Test Entry'
)
Currently, I've solved the problem by looping through each array and formatting the array the way I want, but I think this is a bit of a memory hog.
$entriesArray = array();
foreach ($entryNames as $names) {
foreach ($entryAuthors as $authors) {
if ($names['entry_id'] === $authors['entry_id']) {
$entriesArray[] = array(
'id' => $names['entry_id'],
'title' => $names['title'],
'author_id' => $authors['author_id']
);
}
}
}
I'd like to know is there an easier, less memory intensive method of doing this?
Is it possible you can do a JOIN in the SQL used to retrieve the information from the database rather than fetching the data in multiple queries? It would be much faster and neater to do it at the database level.
Depending on your database structure you may want to use something similar to
SELECT entry_id, title, author_id
FROM exp_weblog_data
INNER JOIN exp_weblog_titles
ON exp_weblog_data.entry_id = exp_weblog_titles.entry_id
WHERE field_id_53 = "%s" AND WHERE entry_id IN ("%s")
Wikipedia has a bit on each type of join
Otherwise the best option may be to restructure the first array so that it is a map of the entry_id to the title
So:
array(
array(
'entry_id' => 1,
'title' => 'Test Entry 1',
),
array(
'entry_id' => 3,
'title' => 'Test Entry 2',
),
)
Would become:
array(
1 => 'Test Entry 1',
3 => 'Test Entry 2',
)
Which would mean the code required to merge the arrays is simplified to this:
$entriesArray = array();
foreach ($entryAuthors as $authors) {
$entriesArray[] = array(
'id' => $authors['entry_id'],
'title' => $entryNames[$authors['entry_id']],
'author_id' => $authors['author_id']
);
}
I've rearranged some of my code to allow for a single SQL query, which looks like:
$sql = sprintf('SELECT DISTINCT wd.field_id_5, wd.entry_id, mb.email, mb.screen_name
FROM `exp_weblog_data` wd
INNER JOIN `exp_weblog_titles` wt
ON wt.entry_id=wd.entry_id
INNER JOIN `exp_members` mb
ON mb.member_id=wt.author_id
WHERE mb.member_id IN ("%s")
AND wd.entry_id IN ("%s")',
join('","', array_unique($authors)),
join('","', array_unique($ids))
);
This solves my problem quite nicely, even though I'm making another SQL call. Thanks for trying.
In response to your comment on Yacoby's post, will this SQL not give the output you are after?
SELECT exp_weblog_data.entry_id, exp_weblog_data.field_id_5 AS title_ie, exp_weblog_titles.author_id
FROM exp_weblog_data LEFT JOIN exp_weblog_titles
ON exp_weblog_data.entry_id = exp_weblog_titles.entry_id
WHERE exp_weblog_data.field_id_53 = "%S"
Every entry in exp_weblog_data where field_id_53 = "%S" will be joined with any matching authors in exp_weblog_titles, if a an entry has more than one author, two or more rows will be returned.
see http://php.net/manual/en/function.array-merge.php
I've got a series of Post models that hasAndBelongsToMany Media models. In certain function calls inside of the Post model, I don't need to retrieve the entire list of Media models. However, when I use the following code:
$this->unbindModel( array('hasAndBelongsToMany' => array('Media')) );
// Rebind to get only the fields we need:
$this->bindModel(
array('hasAndBelongsToMany' => array(
'Media' => array(
'className' => 'Media',
'joinTable' => 'media_posts',
'foreignKey' => 'post_id',
'associationForeignKey' => 'media_id',
'limit' => 1,
'fields' => array('Media.type', 'Media.path', 'Media.title')
)
)
)
);
$this->find('all', $params);
This limit only works on one of the first retrieved Post model and all following Post models have no associated Media:
Array
(
[0] => Array
(
[Profile] => Array
(
)
[Media] => Array
(
[0] => Array
(
[type] => photo
[path] => ''
[title] => ''
)
)
)
[1] => Array
(
[Profile] => Array
(
)
[Media] => Array
(
)
)
)
Any suggestions would be great. Thanks!
why not use the containable behaviour
// you would probably want the next line in the app_model ot be able to use it with all models
$this->Post->actsAs = array('Containable')
$params['conditions'] = array(
);
$params['contain'] = array(
'Media' => array(
'fields' => array(
'type', 'path', 'title'
),
'limit' => 1
)
);
$this->Post->find('all', $params);
EDIT:
Just tried that and got this sql (Module <-> Tag):
SELECT `Module`.`id` FROM `modules` AS `Module` WHERE 1 = 1
and
SELECT `Tag`.`id`, `ModulesTag`.`module_id`, `ModulesTag`.`tag_id`
FROM `tags` AS `Tag`
JOIN `modules_tags` AS `ModulesTag`
ON (`ModulesTag`.`module_id` IN (1, 2, 3, 4) AND `ModulesTag`.`tag_id` = `Tag`.`id`)
WHERE `Tag`.`belongs_to` = 'Module'
ORDER BY `Tag`.`name` ASC
LIMIT 1
obviously that cannot return the wanted result, as you would have to do a query for each Module result (which then again would result in way too many queries).
As a conclusion I would return all Tags (in my example) as the overhead in too many result rows is better than the overhead of too many queries..
Cake fetches all the Habtm-related records in one batch query and then assembles them into the results array afterwards. Any additional conditions you specify in the association will be used as is in the query, so it'll look something like this:
SELECT … FROM Media WHERE Media.id in (1, 2, 3, …) LIMIT 1
So it'll only retrieve a single HABTM model.
There's no apparently easy solution for this. Maybe you could think about the original premise again and why the "first" (LIMIT 1) record is supposedly the right one, maybe you can find a different condition to query on.
Failing that, you could rebind your models so Media has a hasMany relationship to medias_posts, the pivot table. For hasMany and belongsTo queries, Cake automatically does JOIN queries. You could use a GROUP BY clause then, which would give you the desired result:
SELECT … FROM Media JOIN medias_posts … GROUP BY medias_posts.post_id
You might also want to experiment with passing the 'join' parameter with the query, to achieve that effect without extensive rebinding.
$this->Media->find('all', array('join' => array(…), …));
Try this:
$this->yourModel->hasAndBelongsToMany['Media'] = false; // or null
And then set your HABTM association manually
$this->yourModel->hasAndBelongsToMany['Media'] = array(........);
Or simply modify the association without nulling it:
$this->yourModel->HABTM['Media']['fields'] = array(....)
CakePHP has a very powerful tool for this containable behaviour