I have used scrapy(a python crawler framework), I crawled some images and dowload them,also I store the image online url in mysql table and after download I store the local path into mysql.now there is one problem, when I try to display the image with php, it can't access the image...it just display **404*
my mysql table：
+-------------+-------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------------+-------------+------+-----+---------+----------------+
| id | int(11) | NO | PRI | NULL | auto_increment |
| brand | varchar(45) | NO | | NULL | |
| series | varchar(45) | NO | | NULL | |
| commodity | varchar(45) | NO | | NULL | |
| designer | varchar(45) | NO | | NULL | |
| year | varchar(45) | NO | | NULL | |
| description | text | NO | | NULL | |
| technology | text | NO | | NULL | |
| url | text | NO | | NULL | |
| local_url | text | NO | | NULL | |
| name | text | NO | | NULL | |
| downloaded | tinyint(1) | NO | | 0 | |
| referer | varchar(45) | NO | | NULL | |
+-------------+-------------+------+-----+---------+----------------+
I use url field store the online image url and local_url field store the local image path.
some data in local_url is as following:
agape/— Contenitori/EVO-N\_NIVIS\_ALTO.jpg?1415875406,agape/— Contenitori/EVO-N\_CONTENITORE.jpg?1415875446,agape/— Contenitori/FLAT\_XL\_CONT\_PUZZLE.jpg?1415875463,agape/— Contenitori/EVOLUZIONE\_CONT\_PUZZLE.jpg?1415875485
I user comma to split the image path, the image stored in local is as following:
/var/www/images/agape/— Contenitori/xxx.jpg
the path contains space and other special charater,when I using php get the image from database and try to access the image,it can not be accessed..
the url try to access is as following:
http://45.32.255.165/images/agape/%E2%80%94%20Contenitori/EVO-L_660_PART_CASSETTO_R.jpg?1362501749
hope I describe my question clearly......
Related
I have a laravel project and I don't see where is the bug here.
I have a products table with a "low_stock_warning" integer field and a "units_stock" integer field.
I want to get the products with a "units_stock" less than "low_stock_warning", so I have
$stock_warning = Product::whereRaw('units_stock <= low_stock_warning')
->select('id')
->get();
The result mysql is:
select `id` from `products` where units_stock <= low_stock_warning
If I execute it in my database directly I get one product. Ok, but Eloquent tells me that $stock_warning is an empty array...
What I'm missing here ?
Thanks!
EDIT 1:
I've tried with:
$stock_warning = Product::whereColumn('units_stock', '<=', 'low_stock_warning')->pluck('id');
print_r($stock_warning);
And the result is:
Illuminate\Support\Collection Object ( [items:protected] => Array ( ) )
EDIT 2:
This is the database structure:
--------------
DEVELOPMENT ENVIRONMENT
--------------
+-----------------------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------------------+------------------+------+-----+---------+----------------+
| id | int(11) unsigned | NO | PRI | NULL | auto_increment |
| productdescriptioneng | text | YES | | NULL | |
| units_stock | int(11) | YES | | NULL | |
| low_stock_warning | int(11) | YES | | NULL | |
+-----------------------+------------------+------+-----+---------+----------------+
--------------
PRODUCTION ENVIRONMENT
--------------
+-----------------------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-----------------------+------------------+------+-----+---------+----------------+
| id | int(11) unsigned | NO | PRI | NULL | auto_increment |
| productdescriptioneng | text | YES | | NULL | |
| units_stock | int(11) | YES | | NULL | |
| low_stock_warning | int(11) | YES | | NULL | |
+-----------------------+------------------+------+-----+---------+----------------+
Development:
- Server version: 5.7.21 MySQL Community Server (GPL)
SHOW ENGINES;
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| Engine | Support | Comment | Transactions | XA | Savepoints |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO |
| MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO |
| CSV | YES | CSV storage engine | NO | NO | NO |
| BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) | NO | NO | NO |
| MyISAM | YES | MyISAM storage engine | NO | NO | NO |
| PERFORMANCE_SCHEMA | YES | Performance Schema | NO | NO | NO |
| ARCHIVE | YES | Archive storage engine | NO | NO | NO |
| InnoDB | DEFAULT | Supports transactions, row-level locking, and foreign keys | YES | YES | YES |
| FEDERATED | NO | Federated MySQL storage engine | NULL | NULL | NULL |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
Production:
- Server version: 5.7.21-0ubuntu0.16.04.1 (Ubuntu)
SHOW ENGINES;
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| Engine | Support | Comment | Transactions | XA | Savepoints |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
| MyISAM | YES | MyISAM storage engine | NO | NO | NO |
| MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO |
| CSV | YES | CSV storage engine | NO | NO | NO |
| BLACKHOLE | YES | /dev/null storage engine (anything you write to it disappears) | NO | NO | NO |
| PERFORMANCE_SCHEMA | YES | Performance Schema | NO | NO | NO |
| InnoDB | DEFAULT | Supports transactions, row-level locking, and foreign keys | YES | YES | YES |
| ARCHIVE | YES | Archive storage engine | NO | NO | NO |
| MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO |
| FEDERATED | NO | Federated MySQL storage engine | NULL | NULL | NULL |
+--------------------+---------+----------------------------------------------------------------+--------------+------+------------+
Use the whereColumn() method:
Product::whereColumn('units_stock', '<=', 'low_stock_warning')->pluck('id')
Verify if the product from DB is not soft deleted (deleted_at is not null);
if it is soft deleted, but you need them use this:
Product::whereColumn('units_stock', '<=', 'low_stock_warning')->withTrashed()->pluck('id');
You can use WhereColumn and orWhereColumn to achieve.
Product::whereColumn('units_stock', '<', 'low_stock_warning')
orWhereColumn('units_stock', '=', 'low_stock_warning')
->pluck('id');
Hope this helps
I want to generate a report from a table, like
+-------------+------------------+------+-----+------------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------------+------------------+------+-----+------------+----------------+
| productID | int(10) unsigned | NO | PRI | NULL | auto_increment |
| productCode | char(3) | NO | | | |
| name | varchar(30) | NO | | | |
| quantity | int(10) unsigned | NO | | 0 | |
| price | decimal(7,2) | NO | | 99999.99 | |
+-------------+------------------+------+-----+------------+----------------+
and show with some graphic the the top sellers. I'm lost in this subject.
Is there a package that make this reports?
Thanks for the info in advance.
I don't think there is a package to generate the reports. Reports are all about getting data from DB, analyze and send output to the client/browser. What I would suggest is that get the data from DB and send to the client as JSON. In client side, you can use graph plotting packages like Highchart, D3JS etc to plot the graph.
I'm new to Laravel (using 5.1). I have my entire DB schema (MySQL 5.5) diagrammed and have begin implementing it. The problem is, I need to adapt Laravel to use my sessions table. After making a new migration to bring the table more in line with what Laravel expects, I have this table:
+---------------+---------------------------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------------+---------------------------------------+------+-----+---------+----------------+
| id | bigint(20) | NO | PRI | NULL | auto_increment |
| id_hash | varchar(255) | NO | UNI | NULL | |
| user_id | bigint(20) unsigned | NO | | 0 | |
| created_at | int(10) unsigned | NO | | 0 | |
| updated_at | int(10) unsigned | NO | | 0 | |
| expires_at | int(10) unsigned | NO | | 0 | |
| last_activity | int(10) unsigned | NO | | 0 | |
| platform | enum('d','p','t','b','a','i','w','k') | NO | | d | |
| ip_address | varchar(40) | NO | | 0.0.0.0 | |
| payload | text | NO | | NULL | |
| user_agent | text | NO | | NULL | |
+---------------+---------------------------------------+------+-----+---------+----------------+
The main thing I need to accomplish is to have id as an auto-incrementing integer (because my Session model has relationships to other models) and use id_hash as the publicly identifying string (I also plan to cut id_hash back to 64), which I think is the token in the payload.
At session creation, id_hash, platform, ip_address, and user_agent will be set, never to change again. After authentication, user_id will be populated, then cleared at logout.
I'm ok with keeping the payload handling as-is.
Is this just a matter of creating a custom class that implements SessionHandlerInterface? What else needs to be in it for handling my extra fields that's not obvious from the session docs?
Having some trouble with foreign keys, I am new to MySQL so please forgive. I am not sure how to do what I want.
I have 4 tables:
Users
Tasks
Day
Week (includes Week number and date commencing).
What I want to do is, reference each table to pull the correct data.
E.G. pseudo code:
find user liam, find select day associated with liam, find the task associated with the selected day, find the week from the selected day.
This should then allow me to sieve through the data.
Here are the tables:
+------------+-----------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------+-----------------+------+-----+---------+----------------+
| user_id | int(1) unsigned | NO | PRI | NULL | auto_increment |
| username | varchar(255) | NO | UNI | NULL | |
| password | varchar(255) | NO | | NULL | |
| first_name | varchar(255) | NO | | NULL | |
| last_name | varchar(255) | NO | | NULL | |
| email | varchar(255) | NO | UNI | NULL | |
+------------+-----------------+------+-----+---------+----------------+
+------------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------+------------------+------+-----+---------+----------------+
| day_id | int(10) unsigned | NO | PRI | NULL | auto_increment |
| day | varchar(255) | NO | | NULL | |
| user-id-fk | int(10) unsigned | NO | | NULL | |
+------------+------------------+------+-----+---------+----------------+
+-------------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+-------------+------------------+------+-----+---------+----------------+
| am_id | int(10) unsigned | NO | PRI | NULL | auto_increment |
| am_task | varchar(255) | NO | | NULL | |
| description | varchar(255) | NO | | NULL | |
| am_color | varchar(20) | YES | | NULL | |
+-------------+------------------+------+-----+---------+----------------+
+---------+-----------------+------+-----+------------+----------------+
| Field | Type | Null | Key | Default | Extra |
+---------+-----------------+------+-----+------------+----------------+
| week_id | int(2) unsigned | NO | MUL | NULL | auto_increment |
| week | varchar(255) | NO | | NULL | |
| date | date | NO | | 2014-12-29 | |
+---------+-----------------+------+-----+------------+----------------+
So to start off I understand that I have to reference the first two tables, this is why I have created a field called 'user-id-fk'.
I have tried to create the foreign key inside of phpMyAdmin: http://tinypic.com/r/mkar20/8
But not sure if it is working or if I have created it properly.
As I already said I am new to MySQL so even if I had created it properly, I'm not sure how to test?
I can add any more data if required.
Please note that Foreign keys are only ways ensuring solid data structure within SQL. They aren't technically necessary for querying your data across two or more tables, as long as you have keys that are in common across both tables.
The use of foreign keys may make it easier to make sure you are correctly choosing items from a controlled list. However, as they are good ideas as they ensure integrity in your database, the easiest way to test these, is to set up these keys as RESTRICT and test adding a record from the table that has a foreign key restriction that does not exist on the referenced table It should provide an error.
For instance given one of your examples:
+------------+-----------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------+-----------------+------+-----+---------+----------------+
| user_id | int(1) unsigned | NO | PRI | NULL | auto_increment |
| username | varchar(255) | NO | UNI | NULL | |
| password | varchar(255) | NO | | NULL | |
| first_name | varchar(255) | NO | | NULL | |
| last_name | varchar(255) | NO | | NULL | |
| email | varchar(255) | NO | UNI | NULL | |
+------------+-----------------+------+-----+---------+----------------+
+------------+------------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------+------------------+------+-----+---------+----------------+
| day_id | int(10) unsigned | NO | PRI | NULL | auto_increment |
| day | varchar(255) | NO | | NULL | |
| user-id-fk | int(10) unsigned | NO | | NULL | |
+------------+------------------+------+-----+---------+----------------+
If user-id-fk is a foreign key on that second table referencing user_id on the first table, and you set it up as restrict, you will not be able to add any records into user-id-fk without entering the same user_id into the first table.
Assuming user_id on the first table only values 1, 2, or 3 entered. If you try to enter a row 4 into the second table, it should err, because there is no referenced key on the first table.
Note:
You have created different sized integers for these tables, so you could run into a problem after you have entered 10 people. I recommend making the integer size on user_id to be larger than 1.
I have a table hardware_description:
+------------------+--------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------------+--------------+------+-----+---------+----------------+
| Computer_id | int(11) | NO | PRI | NULL | auto_increment |
| Emp_id | int(11) | NO | MUL | NULL | |
| PC_type | varchar(20) | YES | | NULL | |
| Operating_system | varchar(20) | YES | | NULL | |
| Product_key | varchar(30) | YES | | NULL | |
| Assign_date | date | YES | | NULL | |
| DVD_ROM | varchar(20) | YES | | NULL | |
| CPU | varchar(30) | YES | | NULL | |
| IP_address | varchar(30) | YES | | NULL | |
| MAC_address | varchar(30) | YES | | NULL | |
| Model_name | varchar(30) | YES | | NULL | |
| Model_number | varchar(30) | YES | | NULL | |
| Monitor | varchar(30) | YES | | NULL | |
| Processor | varchar(30) | YES | | NULL | |
| Product_name | varchar(30) | YES | | NULL | |
| RAM | varchar(20) | YES | | NULL | |
| Serial_number | varchar(30) | YES | | NULL | |
| Vendor_id | varchar(30) | YES | | NULL | |
Emp_id is foreign key from employees table.
When I update a particular row, I want the existing data for that row to be saved in another table along with the timestamp of that update action. Now,
a) Shall I use PHP code (PDO transaction) to first grab that row & insert in another table then perform the UPDATE query on that particular row?
b) Use trigger on this table.
Which process is better practice & more efficient? Is there another way of achieving this?
I have not used trigger in my short career so far but I can do it if it is better practice.
If you can do a trigger, it would be a lot better to use that.
The reason for this is that if for some reason you forget to write the PHP code to do this (in some weird situation) - you would have missing, unrelated data - otherwise known as orphaned data, which does not have a corresponding row or set of rows.
Here's the link to the MySQL documentation page for triggers: http://dev.mysql.com/doc/refman/5.0/en/create-trigger.html