I have the models User, Post, Comment and Tag.
User creates Post.
Posts can have multiple Comment and Tag.
Each model has it's own table, so there are tables 'posts', 'comments' and 'tags'. Comments have a foreign key called 'post_id', while Tags have a many_to_many relation table called 'post_tags', in which there are two fields: 'post_id' and 'tag_id'.
I want to get a nested array like below:
Which MySQL queries should I run?
I suppose I need to alter the result with PHP to get my nested array. How?
Thanks a lot for your help :-)
[0] => Array
(
[Post] => Array
(
[id] => 1
[title] => First article
[content] => aaa
[created] => 2008-05-18 00:00:00
)
[Comment] => Array
(
[0] => Array
(
[id] => 1
[post_id] => 1
[author] => Daniel
[email] => dan#example.com
[website] => http://example.com
[comment] => First comment
[created] => 2008-05-18 00:00:00
)
[1] => Array
(
[id] => 2
[post_id] => 1
[author] => Sam
[email] => sam#example.net
[website] => http://example.net
[comment] => Second comment
[created] => 2008-05-18 00:00:00
)
)
[Tag] => Array
(
[0] => Array
(
[id] => 1
[name] => Awesome
)
[1] => Array
(
[id] => 2
[name] => Baking
)
)
)
[1] => Array
(
[Post] => Array
(...
You better of doing 3 queries.
first fetch post (, and left join the user if you need it), and store them like:
$list[$row['post_id']]['Post'] = $row;
then fetch all post-comments and store them as
$list[$row['post_id']]['Comment'][$row['comment_id']] = $row;
then fetch all post-tags
$list[$row['post_id']]['Tags'][$row['tag_id']] = $row;
that far more effective than trying to use a single query,
as a single query going to end up sending the same data multiple times
Related
I need to create a db function for multidimensional array. How deep the array currently dont know, bcoz they will come from xml file.
I have a sample array
Array
(
[employee] => Array
(
[0] => Array
(
[name] => Array
(
[lastname] => Kelly
[firstname] => Grace
)
[hiredate] => October 15, 2005
[projects] => Array
(
[project] => Array
(
[0] => Array
(
[product] => Printer
[id] => 111
[price] => $111.00
)
[1] => Array
(
[product] => Laptop
[id] => 222
[price] => $989.00
)
)
)
)
[1] => Array
(
[name] => Array
(
[lastname] => Grant
[firstname] => Cary
)
[hiredate] => October 20, 2005
[projects] => Array
(
[project] => Array
(
[0] => Array
(
[product] => Desktop
[id] => 333
[price] => $2995.00
)
[1] => Array
(
[product] => Scanner
[id] => 444
[price] => $200.00
)
)
)
)
[2] => Array
(
[name] => Array
(
[lastname] => Gable
[firstname] => Clark
)
[hiredate] => October 25, 2005
[projects] => Array
(
[project] => Array
(
[0] => Array
(
[product] => Keyboard
[id] => 555
[price] => $129.00
)
[1] => Array
(
[product] => Mouse
[id] => 666
[price] => $25.00
)
)
)
)
)
)
I need to enter these type of array to db and then retrieve them in a good non programmer readable format
I created 2 table... 1st for array key with array level field and another for key=value
I tried this
function array_Dump($array, $d=1){
if (is_array($array)){
foreach($array as $key=>$val){
for ($i=0;$i<$d;$i++){
$level=$i;
}
if (is_array($val)){
if (is_int($key)){
array_Dump($val, $d+1);
}else{
$query = "insert into xml_array (level, input) VALUES ('$level','$key')";
insert_sql($query);
array_Dump($val, $d+1);
}
} else {
$query = "insert into xml_data (array_id,level_id, array_key,array_value) VALUES ('$insert_id','$level','$key','$val')";
insert_sql($query);
}
}
}
}
Create a table like this:
attributes(id, parent_id, properties)
where id will be the primary key, parent_id will be the id of the parent record and properties will be a small json field with the atomic properties. This way you support any depth the XML may throw towards your direction.
As about non-programmer representation. For instance you could use a table (you can solve that with divs as well) which will contain a row for each element in the top level array. Such a row would contain separate columns for each property. When a property is an array, then the given cell will be a table of its own, which will be handled similarly as the first table. It is advisable to make the inner tables collapsible, so if one wants to see the main levels only, the user will not have to scroll for a long while.
categories Object
(
[_db:categories:private] => db Object
(
[_pdo] => PDO Object
(
)
[_query] => PDOStatement Object
(
[queryString] => SELECT * FROM categories WHERE name_of_category = ?
)
[_error] =>
[_results] => Array
(
[0] => stdClass Object
(
[id] => 10
[name_of_category] => Vedran
[description_of_category] => adsdasdas
[meta_keywords] => sadasdas
[meta_description] => asdasdas
[notes] => sadsadas
[created] => 2016-01-20 08:26:02
)
[1] => stdClass Object
(
[id] => 9
[name_of_category] => VEdran
[description_of_category] => ddddd
[meta_keywords] => qsqddd
[meta_description] => sqdddd
[notes] => sddd
[created] => 2020-01-16 00:00:00
)
)
[_count] => 2
)
[_fields:categories:private] =>
)
Hello. Can someone help me please with this array. I have created in database categories table. I would like to show categories on page where user would be able to manage categories (delete, edit). When i want to show categories from database i get this array in PHP. Now i dont know how to show for example only "name_of_category" on web page. Can someone please help me.
$categories=$ObjVariable->_results;
then use the $categories array to display the values
I'm having trouble modeling my database. Currently it looks like this (I'm hiding the irrelevant fields): http://i.imgur.com/SF9FzaD.png
It is working fine, for example, when I want it to return a list of all the servers:
$this->Server->find('all');
It returns an array with the right information:
Array
(
[0] => Array
(
[Server] => Array (...)
[User] => Array (...)
[Highlight] => Array
(
[0] => Array
(
[id] => 39
[id_server] => 8
[id_highlight] => 1
)
[1] => Array
(
[id] => 40
[id_server] => 8
[id_highlight] => 5
)
)
[SubServer] => Array(...)
)
[1] => Array
(
[Server] => Array (...)
[User] => Array (...)
[Highlight] => Array
(
[0] => Array
(
[id] => 41
[id_server] => 10
[id_highlight] => 4
)
[1] => Array
(
[id] => 42
[id_server] => 10
[id_highlight] => 5
)
)
[SubServer] => Array(...)
)
)
In short, each game "server" has some kind of higlights pointed by the user. Like "Anti-cheat system", "Active staff", "Custom events", etc. Each of these highlights have an id and a name.
Is there a way to grab the name from the table highlight_names corresponding to each of the highlights.id_hightlight (and the rest of the data, like the array above) using Model::find()?
I'm a beginner in this framework. Though I have gone over the basics, there is one thing which is troubling me. As of now, I'm using
$group_sql = "SELECT uid FROM {$table}";
$group_users = Yii::app()->db->createCommand($group_sql)->queryAll();
print_r($group_users);
results in
Array
(
[0] => Array
(
[uid] => 2
)
[1] => Array
(
[uid] => 3
)
[2] => Array
(
[uid] => 4
)
[3] => Array
(
[uid] => 5
)
)
But I'd like to change the format in which the data is returned. What I'm looking for is something like
Array
(
[0] => 2
[1] => 3
[2] => 4
[3] => 5
)
OR
Array
(
[uid] => Array
(
[0] => 2
[1] => 3
[2] => 4
[3] => 5
)
)
I'm aware that I can go through the documentation and get my answer, but due to time constraints, I'm taking the liberty to shamelessly ask this over here.
Thanks in advance.
Use queryColumn() method instead of queryAll()
Im working with CakePHP since very recently..
I've got a table 'advertisers' and a table 'users', aswell as a table 'advertisers_users', that only contains 'advertiser_id' and 'user_id'.
. User hasAndBelongsToMany Advertiser.
I need an array in which i can find all advertisers (names and id's) that habtm to the current user id in my User-Controller. how can i do that in cakephp?
like
$this->User->Advertiser->find('all', array('conditions' => '?'));
Thank you all in advance!
$this->User->find(user_id);
Give an array with (if $this->User->recursive is set to 1 )
Array
(
[User] => Array
(
[id] => 2745
[name] => Chocolate Frosted Sugar Bombs
)
[Advertiser] => Array
(
[0] => Array
(
[id] => 123
[name] => blabla
)
[1] => Array
(
[id] => 124
[name] => blabla
)
[2] => Array
(
[id] => 125
[name] => blabla
)
)
)