As soon as we start working on an API, design issues arise. A robust and strong design is a key factor for API success. A poorly designed API will indeed lead to misuse or — even worse — no use at all by its intended clients: application developers.
Creating and providing a state of the art API requires taking into account:.Kinu australia
REST best practices are still being debated and consolidated, which is what makes this job fascinating. To describe your resources, use concrete names and not action verbs.
For decades, computer scientists used action verbs in order to expose services in an RPC way, for instance: getUser createUser user deleteAddress They are just a way of naming the resources to resemble natural language while avoiding spaces, apostrophes, and other exotic characters.
This habit is universal in programming languages where only a finite set of characters is authorized for names. CamelCase has been popularized by the Java language. It intends to emphasize the beginning of each word by making the first letter uppercase. Aside from debates about its readability, its main drawback is to be ineffective in contexts which are not case sensitive. However, its popularity has decreased due to a lot of abuses in C programs with over-extended or too short names.
Unlike camel case, there are very few contexts where snake case is not usable. The pros and cons are quite similar to those of snake case, with the exception that some languages do not allow hyphens in symbol names for variable, class, or function naming.
You may find it referred to as lisp-case because it is the usual way to name variables and functions in Lisp dialects. Examples: spinal-case, current-user, etc. In practice, though, a sensitive case may create dysfunctions with APIs hosted on a Windows system. It is recommended to use spinal-case which is highlighted by RFCthis case is used by Google, PayPal and other big companies. Requests using GET should only retrieve data and should have no other effect on the data.
A POST request is used to send data to the server, for example, customer information, file upload, etc. HTTP header fields provide required information about the request or response, or about the object sent in the message body. These header fields define meta information about the entity-body or, if no BODY is present, about the resource identified by the request. It is necessary to anticipate the paging of your resources in the early design phase of your API.
A Guide to SQL Naming Conventions
It is indeed difficult to foresee precisely the progression of the amount of data that will be returned. Therefore, we recommend paginating your resources with default values when they are not provided by the calling client, for example with a range of values .
Filtering consists in restricting the number of queried resources by specifying some attributes and their expected values. It is possible to filter a collection on several attributes at the same time and to allow several values for one filtered attribute.
Sorting the result of a query on a collection of resources. A sort parameter should contain the names of the attributes on which the sorting is performed, separated by a comma. A search is a sub-resource of a collection.Uninstall freecad ubuntu
As such, its results will have a different format than the resources and the collection itself. This allows us to add suggestions, corrections, and information related to the search.
Parameters are provided the same way as for a filter, through the query-string, but they are not necessarily exact values, and their syntax permits approximate matching. The request was invalid or cannot be served. The exact error should be explained in the error payload. API developers should avoid this error. If an error occurs in the global catch blog, the stack trace should be logged and not returned as a response.Comment 4. One of Java's big strengths, in my opinion, is the fact that most naming conventions have been established by the creators of the language.
Start Query Management Query (STRQMQRY)
If someone does not adhere to these conventions, the resulting code quickly looks non-idiomatic. There seems to be a tendency towards writing identifiers in lower case, with no agreement on the case of keywords. That's for style. And I'd love to hear your opinion on style and naming conventions in the comments!
In many languages, naming conventions of identifiers is not really relevant, because the way the language designs namespacing, there is relatively little risk for conflict. In SQL, this is a bit different. Most SQL databases support only a layered set of namespaces:. In any case, there is no such concept as package "schema" hierarchies as there is in languages like Java, which makes namespacing in SQL quite tricky.
A problem that can easily happen when writing stored procedures:. ID parameter could be resolved by the unqualified ID expression. This is easy to work around, but a tedious problem to think of all the time.
In the SQL language, it is mostly easy to distinguish between them by qualifying them. But in clients e. Javathey are less easy to qualify properly. If we put the query in a view, it gets even trickier. Hence, SQL and the procedural languages are a rare case where some type of Hungarian notation could be useful.
Unlike with hungarian notation itself, where the data type is encoded in the name, in this case, we might encode some other piece of information in the name. Here's a list of rules I've found very useful in the past:. Tables, views, and other "tabular things" may quickly conflict with each other.
Especially in Oracle, where one does not simply create a schema because of all the security hassles this produces schemas and users are kinda the same thing, which is nuts of course. A schema should exist completely independently from a userit may be useful to encode a schema in the object name:. Besides, when using views for security and access controlone might have additional prefixes or suffixes to denote the style of view:.
This list is obviously incomplete. I'm undecided whether this is necessarily a good thing in general. For example, should packages, procedures, sequences, constraints be prefixed as well? Often, they do not lead to ambiguities in namespace resolution.
The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Are there any naming conventions or standards for Url parameters to be followed. I generally use camel casing like userId or itemNumber. As I am about to start off a new project, I was searching whether there is anything for this, and could not find anything. I am not looking at this from a perspective of language or framework but more as a general web standard.
If you're using parameters in your URI, it might be better to rewrite them to reflect what the data actually means. It creates a more obvious data structure, and means that if you change the platform architecture, your URI's don't change. Without the above structure.Fm tuner with digital output
In general, you should only use query strings when the user could reasonably expect the data they're retrieving to be generated, e. If you're using a query string to retrieve an unchanging resource from a database, then use URL-rewriting.
There are no standards that I'm aware of. Anything after the standardized portion of the URL is left to you.
You probably only want to follow a particular convention on your parameters based on the framework you use. Most of the time you wouldn't even really care because these are not under your control, but when they are, you probably want to at least be consistent and try to generate user-friendly bits:.
I would say that cleanliness and user-friendliness are laudable goals to strive for when presenting URLs. StackOverflow does a fairly good job of it. I use lowercase. Depending on the technology you use, QS is either threated as case-sensitive eg. PHP or not eg. Using lowercase avoids possible confusion. The only "standard" I would adhere to is to use the more search engine friendly practice of using a URL rewriter. However within your application websiteyou should stick to your own standards.
For your own sanity if nothing else. Learn more. What are the url parameters naming convention or standards to follow Ask Question. Asked 11 years, 1 month ago.
Active 10 months ago. Viewed 28k times. Andrew Tobilko Dinesh Manne Dinesh Manne 1, 6 6 gold badges 21 21 silver badges 32 32 bronze badges.Further, you can use certain prefixes to the parameter names.
If the prefix is clear enough, you can use the prefix itself as the parameter name. To understand the syntax of the DAX functions and to use data values appropriately for the relevant DAX function parameters, you need to understand DAX parameter naming conventions.
Any DAX expression that returns a single scalar value where the expression is to be evaluated exactly once before all other operations. The name of an existing column using standard DAX syntax, usually fully qualified. It cannot be an expression. You can omit the parameter name and use only the prefix, if the prefix is clear enough to describe the parameter.
Omitting the parameter name and using only prefix can sometimes help in avoiding the clutter during reading. As seen, by using only the prefixes, the function is more readable. However, sometimes the parameter name and the prefix have to be present for clarity.
The parameter name is ColumnName and the prefix is Year. Both are required to make the user understand that the parameter requires a reference to an existing column of years. Previous Page. Next Page. Previous Page Print Page.To use this command, you must first identify the query that is to be processed. If the SQL statement inside the query does not create an answer-set, then no report or output file is created.
If prompting is enabled, query management asks the user to provide a value for each variable that was not set. Specifies whether the output from the command is shown at the requesting work station, printed with the job's spooled output, or directed to a database file. Specifies which query management report form is to be applied to the answer-set to format the printed or displayed output. Specifies the database file that receives the query output. If the file specified does not exist, the system creates it in the specified library as a table in a collection.
Any information that has to be derived in this way is discarded when the command completes. No query management object is created. Specifies the variables that are set by query management before the query is run. Up to 50 variables can be set. The library list is searched for form FORM1, which is used for the output sent to the display.
The library list is searched for query management form FORM1 whose information is used to format the output. The report is formatted and printed on the printer specified in the printer file associated with the query session.
These two variables contain the entire structured query language SQL statement. You can show the output on the display, print it, or store it in a database file. This is a required parameter. Qualifier 1: Query management query name Specify the name of the query to run. If no library is specified as the current library for the job, the QGPL library is used.
Output OUTPUT Specifies whether the output from the command is shown at the requesting work station, printed with the job's spooled output, or directed to a database file. If the command is run in batch mode, the output is sent to the default printer used by query management.In this article we learn about naming conventions for all objects that are mainly used in SQL. The main purpose for adopting a naming convention for database objects is so that you and others can easily identify the type and purpose of all objects contained in the database.
In computer programming, a naming convention is a set of rules for choosing the character sequence to be used for identifiers that denote variables, types, functions and other entities in source code and documentation. A well-defined object name defines all the information about itsself, like type of object, work of object, Name of Table View on which it will work. Which naming convention i s used depends on each person and organization. Views Views are like a virtual table based on the result-set of SQL statements.
A view contains rows and columns, just like a real table. The fields in a view are fields from one or more real tables in the database. The naming convention for the table name is as in the following:. Primary Key Constraints A primary key uniquely identifies each record in a table.
The naming convention for a primary key is as in the following:. Foreign Key Constraints A Foreign Key is a field in the database table that is the primary key in another table.Section 1 Module 1 Part 8: URLs & Query Parameters (8:45)
The purpose of the foreign key is to ensure referential integrity of the data. Naming convention for Foreign Key. Default Constraints In the default constraint a column has a default value when any value is not provided. The naming convention for the default constraint is:.
The unique constraint prevents two records from having identical values in a specific column. The naming convention for a unique constraint is:. Check Constraint A Check Constraints provides a condition for a column that must be followed by each row. The naming convention for a check constraint is:. User-defined functions A user-defined function is a set of SQL statements that accept input, perform execution and return a result.
It only takes a minute to sign up. I disagreed with one convention he proposed:. While he put forward arguments for short-term memory and readability, I disagreed on the fact that it rather decreases readability, IDEs like Eclipse format variables differently depending on their type, and this problem would be avoided with a good class and method design.
As Wikipedia says on the subject - Rules for naming of java. Local variables, instance variables, and class variables are also written in lowerCamelCase. Certain coding conventions state that underscores should be used to prefix all instance variables, for improved reading and program understanding.
As per the Clean Code specification about the methods these should be short as much they can you do for readability and variables names should should not be mind mapped, they should be relevant to your operation that your method perform.
And you should be using an editing environment that highlights or colorizes members to make them distinct. Besides, people quickly learn to ignore the prefix or suffix to see the meaningful part of the name. The more we read the code, the less we see the prefixes. Eventually the prefixes become unseen clutter and a marker of older code.
This is an old question, but I'm going to post here anyway. I think that naming your variable with a short indication as to their scope is really really useful for the next person or yourself who will look at your code. One does not already look at code in an IDE with pretty colors and I can't remember what the colors means and different IDE show different colors, etc.
True, methods should be short enough so it's not loaded with tons of variables and tons of code but even on short one - when you look at code that is totally unfamiliar, it is sometimes hard to tell whether a variable is a class variable, local variable or method parameter. To be able to distinguish at a glance makes it very easy to review the code you are unfamiliar with.
Now, time yourself and look at the code extracted from ElasticsearchTemplate from the spring-data-elasticsearch project - the code I was reviewing which prompted me to search on Google for what people say about naming conventions. Is that perfect? I don't think so. But the above, as far as variables are concerned, is now easier to read.
There are other things such as alignment and spacing, which I won't get into in this answer as it is not related to the question, which would make it easier to read as well. You don't like Camel Case?
Fine, use underscores, etc, but prefix your local variables and your parameters to make them different than class instance variables. You don't like a and my - fine, just stay consistent within your project and use something else Rule 2: make it easy to read and don't require the reader to know everything before he can learn.
This is largely a matter of preference, and as such there is no 'correct' answer. So, this question might actually be closed. But before it does, let me tell you that I totally agree with you. Prefixes decrease visibility as far as I am concerned.Amada press brake error codes
Let alone the fact that if there are to be any prefixes, they should be used for more useful stuff, like the original intention of the Hungarian Notationand not for things that your IDE can provide highlighting for anyway. I never, ever use headlessCamelCase because it is lame : a single-component identifier looks like lowercase, even if it was intended to be headlessCamelCase.
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