Выполнение запросов к базе данных
рейтинг: 9.2/10, голосов: 12
Из всего разнообразия методов класса JDatabase самым основным является query(). Он выполняет запросы напрямую в базу данных, без дополнительных вмешательств со стороны Joomla.
Обычная функция PHP mysql_query обычно вернет ссылку на ресурс, который потом с помощью нескольких действий можно преобразовать в нормальный ответ в виде ассоциативного массива. Метод query(), в отличие от функций PHP, вернет булево значение, по которому можно понять выполнился запрос или нет. Обычно его используют в следующих типах запросов:
- DELETE
- INSERT
- RENAME
- REPLACE
- UPDATE
Хотя никто не запрещает писать там что-нибудь и посложнее. Разберем выше сказанное на практике. Попробуем к примеру выполнить запрос, который удаляет из таблицы «#__mycomponent_foobars» все записи, где ordering больше 4.
// берем ссылку на объект базы данных
$db =& JFactory::getDBO();
// подготовка имен
$tableName = $db->nameQuote('#__mycomponent_foobars');
$columnName = $db->nameQuote('ordering');
// строим SQL
$sql = "DELETE FROM $tableName WHERE $columnName > 4 ";
// предварительно устанавливаем текст запроса
$db->setQuery($sql);
// выполняем запрос и в зависимости от ответа выполняем соответствующее действие
if ($db->query()) {
// успешно выполнился
} else {
// неудача (например, ошибка в синтаксисе SQL)
}
Так, как в случае неудачи мы получим FALSE, то после проверки запроса можно сделать вывод ошибок, например в log-файл.
Очень полезным может оказаться метод JDatabase::getAffectedRows(), который вернет количество строк, к которым был применен последний запрос. Используется следующим образом:
// в случае успеха
$affectRowCount = $db->getAffectedRows();
// выводим сообщение
echo JText::sprintf('DELETED %u RECORDS', $affectRowCount);
т.е получается что по ссылке запустится модуль, а модуль снова вернет нас к ссылке?
You are so cool! I do not suppose I have read anything
like this before. So nice to find someone with a few genuine thoughts on this subject.
Seriously.. thanks for starting this up. This site is one thing that's needed on the web, someone with a little originality!
Hello i am kavin, its my first occasion to commenting
anyplace, when i read this paragraph i thought i could also create comment due to
this sensible piece of writing.
My partner and I stumbled over here from a different
page and thought I might as well check things out.
I like what I see so now i'm following you. Look forward
to checking out your web page for a second time.
Quality articles or reviews is the main to
invite the viewers to visit the site, that's what this website is providing.
What's up, yup this post is truly pleasant and I have learned lot
of things from it regarding blogging. thanks.
I think everything composed was very logical. But, what about this?
suppose you typed a catchier post title?
I mean, I don't want to tell you how to run your blog, but suppose you added a
title that makes people want more? I mean Выполнение запросов к базе данных / Работа с базой данных .:.
Документация Joomla! CMS is a little boring.
You ought to look at Yahoo's front page and see how they write post headlines
to grab viewers to open the links. You might add a
video or a pic or two to get readers excited about
everything've written. In my opinion, it could bring your posts a little livelier.
naturally like your web site however you need to check the spelling on several of your posts.
A number of them are rife with spelling issues and I find it very
bothersome to tell the truth then again I'll surely
come back again.
Hi there to all, how is everything, I think every one is getting more
from this web site, and your views are pleasant designed for new people.
What's up everyone, it's my first pay a quick visit at this
website, and post is really fruitful designed for me,
keep up posting these types of posts.
Thanks , I have just been looking for info approximately this topic for a while and yours is the
greatest I have discovered till now. However, what about the conclusion? Are you certain in regards to
the source?
Master The Curriculum Time Difference Between Feet And Meter In Poetry
Froebel Public School Cutting For Stone Genre
English Language And Literature Journal Super Teacher Reading Comprehension
Physics For Scientists And Engineers Review To Kill A Mockingbird Litcharts Chapter 13
Polytechnic Admission Test 2019 Assam Emotional Intelligence 2.0 Self Management Strategies
Octavia Butler Net Worth Free Audio Books Online Download Harry Potter
Wow! This blog looks exactly like my old one!
It's on a entirely different subject but it has
pretty much the same page layout and design. Outstanding choice of colors!
0mniartist asmr
Right here is the right webpage for anybody who really wants to understand this topic.
You understand a whole lot its almost hard to argue with you (not that
I really would want to…HaHa). You definitely put a new spin on a topic which has been discussed for ages.
Excellent stuff, just wonderful! asmr 0mniartist
Very descriptive article, I enjoyed that bit. Will there be a part
2? asmr 0mniartist
Keep this going please, great job! asmr 0mniartist
whoah this weblog is excellent i love reading
your articles. Stay up the good work! You know, a lot of persons are searching round for this information, you could help them greatly.
0mniartist asmr
Good Books To Read With Your Mom Red White And Royal Blue Review
Z Words In The Lion The Witch And The Wardrobe
The Westing Game Jake Wexler
Interesting Science Articles For Middle School John Green Books
Online Shopping
Plato Republic Literature Autobiography Usain Bolt
I enjoy what you guys tend to be up too. This sort of clever work and exposure!
Keep up the fantastic works guys I've incorporated you guys to my own blogroll.
Wow, great blog article.Really thank you! Really Great.
cccc nursing application deadline role of teacher
as a counsellor
https://100bestczbooks.blogspot.com
pomona college dorms reddit lava my z customisation
https://bestczreada.blogspot.com
Wow, amazing weblog format! How lengthy have you ever been running a blog for?
you make blogging glance easy. The full glance of your website is wonderful, let alone the content material!
I am regular visitor, how are you everybody? This paragraph
posted at this web page is truly good.
Hello my friend! I wish to say that this post
is amazing, great written and include approximately
all vital infos. I would like to look more
posts like this .
Hurrah, that's what I was seeking for, what a stuff!
present here at this web site, thanks admin of this site.
Its like you learn my mind! You seem to know so much approximately
this, like you wrote the e book in it or something.
I believe that you just could do with a few % to pressure the message house a bit, but other than that, this is magnificent blog.
An excellent read. I'll certainly be back.
I’m not that much of a online reader to be honest but your
sites really nice, keep it up! I'll go ahead and bookmark your website to come back later.
Many thanks
We are a bunch of volunteers and starting a new scheme
in our community. Your website provided us with valuable
info to work on. You have performed a formidable task and our whole community shall be thankful to you.
It's not my first time to go to see this website, i am visiting
this website dailly and take pleasant facts from here every day.
If some one desires to be updated with hottest technologies afterward he must be go to see this website and be up to date everyday.
I was recommended this website by my cousin. I am not sure whether this post is written by him as nobody else know
such detailed about my trouble. You are amazing!
Thanks!
Hello my loved one! I wish to say that this post is amazing, nice written and come
with approximately all vital infos. I would like to peer more posts like this .
This site truly has all the information I needed concerning this
subject and didn't know who to ask.
You are so interesting! I don't suppose I've read
through a single thing like this before. So great to
find someone with genuine thoughts on this subject. Seriously..
thanks for starting this up. This website is
something that's needed on the internet, someone with a little originality!
Hello! Do you use Twitter? I'd like to follow you if that would be ok.
I'm undoubtedly enjoying your blog and look forward to new posts.
You've made some decent points there. I looked
on the web for more information about the issue and found most individuals
will go along with your views on this website.
When someone writes an post he/she retains the
image of a user in his/her mind that how a user can understand it.
Thus that's why this article is outstdanding.
Thanks!
Currently it sounds like Movable Type is the top
blogging platform out there right now. (from what
I've read) Is that what you are using on your blog?
Yes! Finally something about a.
Attractive section of content. I just stumbled upon your weblog and in accession capital
to assert that I get in fact enjoyed account your blog
posts. Anyway I will be subscribing to your augment and even I achievement
you access consistently quickly.
Very rapidly this site will be famous amid all blogging
viewers, due to it's fastidious content
Hey! Quick question that's totally off topic. Do you
know how to make your site mobile friendly? My web site looks weird when viewing from my iphone.
I'm trying to find a theme or plugin that might be able to correct this
issue. If you have any recommendations, please share. Thank you!
I savour, result in I found exactly what I used to be having
a look for. You've ended my 4 day long hunt!
God Bless you man. Have a great day. Bye
I just could not leave your web site before suggesting that I actually enjoyed the usual info an individual provide for your guests?
Is gonna be back often to investigate cross-check new posts
Link exchange is nothing else but it is simply placing
the other person's weblog link on your page at appropriate place and other person will also do similar
in favor of you.
WOW just what I was searching for. Came here by searching for or
My brother recommended I may like this web site. He was
once entirely right. This put up actually made my day.
You cann't believe simply how so much time I had spent for this
info! Thanks!
Quality articles or reviews is the important to attract the viewers to go to
see the site, that's what this web page is providing.
Hey there! Someone in my Facebook group shared this website
with us so I came to check it out. I'm definitely loving the information. I'm book-marking and will be tweeting this to my followers!
Terrific blog and amazing design and style.
Greetings! I know this is kinda off topic but I was wondering which blog platform are you using for this site?
I'm getting sick and tired of Wordpress because I've had issues with hackers
and I'm looking at options for another platform.
I would be awesome if you could point me in the direction of a good platform.
Thanks for sharing such a nice opinion, paragraph is nice, thats why i have read
it entirely
Hey there! I just wanted to ask if you ever have any trouble with
hackers? My last blog (wordpress) was hacked and I ended up
losing a few months of hard work due to no backup. Do you have any methods to stop hackers?
Hello There. I discovered your weblog using msn. That is a really neatly written article.
I'll be sure to bookmark it and come back to read extra of your useful info.
Thanks for the post. I'll certainly return.
Magnificent beat ! I wish to apprentice even as you
amend your site, how could i subscribe for a blog web site?
The account aided me a appropriate deal. I were tiny bit acquainted of
this your broadcast offered vibrant clear concept
I am sure this post has touched all the internet visitors, its
really really nice article on building up new blog.
Hi there! This blog post couldn't be written any better!
Reading through this post reminds me of my previous roommate!
He continually kept preaching about this.
I most certainly will send this post to him. Pretty sure he's going to have
a great read. I appreciate you for sharing!
You could certainly see your enthusiasm within the article you write.
The sector hopes for even more passionate writers like you who aren't afraid to say how they believe.
At all times go after your heart.
You should take part in a contest for one of the highest quality blogs on the net.
I'm going to highly recommend this site!
Incredible story there. What happened after? Good luck!
I am no longer positive where you are getting your info, but great topic.
I needs to spend some time finding out more
or working out more. Thank you for wonderful info I
was looking for this info for my mission.
I think everything published was very reasonable.
But, what about this? what if you added a little content?
I mean, I don't wish to tell you how to run your blog, but what if you added something that grabbed
people's attention? I mean Выполнение запросов к базе данных / Работа с базой данных .:
. Документация Joomla! CMS is kinda plain. You ought to peek at Yahoo's
home page and note how they write post headlines to get viewers to click.
You might add a related video or a related picture or two
to get people interested about everything've written. Just my opinion, it would make your
posts a little bit more interesting.
This article gives clear idea for the new viewers of blogging,
that actually how to do blogging and site-building.
Hello joomla-book.ru admin, You always provide valuable information.
Great beat ! I would like to apprentice while you amend your website,
how can i subscribe for a blog web site? The account aided me a acceptable deal.
I were a little bit acquainted of this your broadcast offered brilliant clear concept