Processing can be enabled for a single version by setting the processing flag on the version like so:. If you want to use fog you must add in your CarrierWave initializer the following lines. Ensure you have it in your Gemfile:. For the sake of performance it is assumed that the directory already exists, so please create it if it needs to be. Here's a full example:. That's it! Note : for Carrierwave to work properly it needs credentials with the following permissions:.
Fog is used to support Rackspace Cloud Files. You'll need to configure a directory also known as a container , username and API key in the initializer. For the sake of performance it is assumed that the directory already exists, so please create it if need be. You can optionally include your CDN host name in the configuration.
This is highly recommended, as without it every request requires a lookup of this information. Fog is used to support Google Cloud Storage. You'll need to configure a directory also known as a bucket and the credentials in the initializer. You can still use the CarrierWave::Uploader url method to return the url to the file on Google.
Since Carrierwave doesn't know which parts of Fog you intend to use, it will just load the entire library unless you use e. If you prefer to load fewer classes into your application, you need to load those parts of Fog yourself before loading CarrierWave in your Gemfile. Beware that this specific require is only needed when working with a fog provider that was not extracted to its own gem yet.
A list of the extracted providers can be found in the page of the fog organizations here. If you're uploading images, you'll probably want to manipulate them in some way, you might want to create thumbnail images for example. CarrierWave comes with a small library to make manipulating images with RMagick easier, you'll need to include it in your Uploader:.
You can set a process callback, which will call that method any time a file is uploaded. There is a demonstration of convert here. Convert will only work if the file has the same file extension, thus the use of the filename method. Check out the manipulate! This allows you to have the power of ImageMagick without having to worry about installing all the RMagick libraries. Currently, the MiniMagick carrierwave processor provides exactly the same methods as for the RMagick processor.
See the documentation for CarrierWave::Compatibility::Paperclip for more details. The Active Record validations use the Rails i18n framework. Add these keys to your translations file:.
The carrierwave-i18n library adds support for additional locales. By default, CarrierWave copies an uploaded file twice, first copying the file into the cache, then copying the file into the store. For large files, this can be prohibitively time consuming. By default, mounting an uploader into an ActiveRecord model will add a few callbacks. For example, this code:. If you want to skip any of these callbacks eg. In addition to the ActiveRecord callbacks described above, uploaders also have callbacks.
Uploader callbacks can be before or after the following events:. Successful candidates can manipulate data using simple calculations while taking certain details into consideration, such as sorting data and excluding certain entries. The test evaluates the results using a set of test cases that checks standard and corner cases of the solution. NET, and Embedded Systems. In recognition of his contribution to IT education, he has been awarded the "Best. We assess potential subject-matter experts based on their knowledge, ability, and reputation.
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Summary of the SQLite coding : entry-level database operations test This SQLite coding test evaluates candidates' ability to manipulate a database with low complexity and create a query that satisfies given requirements. Active Oldest Votes. Peer authentication The peer authentication method works by obtaining the client's operating system user name from the kernel and using it as the allowed database user name with optional user name mapping.
Password authentication The password-based authentication methods are md5 and password. Ekevoo 2, 1 1 gold badge 21 21 silver badges 33 33 bronze badges. To answer my own question: 'peer' authentication means that postgres asks the operating system for your login name and uses this for authentication, so the user on the OS and on postgres must be the same. I understand the change. But why isn't this the default behaviour? Is there any drawback using md5? Show 19 more comments. After installing Postgresql I did the below steps.
Authentication methods details: trust - anyone who can connect to the server is authorized to access the database peer - use client's operating system user name as database user name to access it.
Arivarasan L Arivarasan L 7, 2 2 gold badges 34 34 silver badges 46 46 bronze badges. On OS X homebrew the default is trust, while on Ubuntu somehow the default is set to "peer", which led to discrepancies between my setup and that of my colleague. We changed his to MD5 which didn't help, so "trust" is the real answer here We're only doing development testing.
Should get more upvotes. This way is working for me, using method md5 first was not. Show 6 more comments. StylusEater StylusEater 3, 1 1 gold badge 14 14 silver badges 13 13 bronze badges.
I think this is the best solution as it actually solves the local problem without messing without messing with global configuration as the other answers recommend.
I had to change host: This is much more elegant when compared to messing with the local peer authentication method. This just hits me again, thinking of beeing on localhost ist not the same as telling this to psql. This has worked for me!! This should be the best answer to the question. Add a comment. Suraj Rao Gihan Gamage Gihan Gamage 1, 13 13 silver badges 22 22 bronze badges. I didnt think it would be that simple, but this worked for me under debian 9 — Hayden Thring.
Note that "password" sends passwords in clear text; "md5" is preferred since it sends encrypted passwords. Taimoor Changaiz Taimoor Changaiz 8, 4 4 gold badges 46 46 silver badges 51 51 bronze badges.
Simplest solution without changing configs. I had the same problem. The solution from depa is absolutely correct. Just make sure that u have a user configured to use PostgreSQL. With more displayable tabs across the screen, it becomes difficult to find what you need.
Protection is geared much more towards protecting the structure of the workbook rather than the data. You can try to lock some sheets and cells to stop users from changing the structure and formula, but if they can see the data, they can usually change any or all of it unless you do some creative macro programming.
This scenario stems from the intended use and flexible nature of Excel. It is, after all, a spreadsheet engine. Other applications are better suited to such tasks—mainly because they get explicitly designed to do them. Take the opportunity to make it better. There are general-purpose database applications available, with which you can construct a bespoke solution. Alternatively, you may find that a specialist database application—one already designed for the purpose you require—is cheaper, faster to implement, and a better fit.
For instance, if you have a list of customers and the details of all your interactions with them, that is considered a customer relationship management CRM system.
Despite its fancy name, a CRM system is a specialized database. Similarly, account packages such as QuickBooks and Sage are specialist databases. The most common database type is a relational database, which stores its data in tables and consists of rows and columns. Each row holds the data for a separate item. The tables have relationships defined between them so that, say, an invoice carries the customer ID. To create a database, you have to define these tables and relationships and then define the screen layouts you want to use to list and edit the data.
There are dozens of database applications out there. Some are easy to use and do the entire job, allowing you to customize the tables, data-entry screens, and reports.
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