We can write sqls like following in play2's anorm:
def findById(id: String): Option[Link] = DB.withConnection {implicit connection =>
SQL("select * from links where id={id}").on('id -> id).as(simple.singleOpt)
}
It uses {xxx} format as the placeholder, and the specify a map 'id->id. Is there anyway to use ? as the placeholder as we do in play1?
I hope I can write it like:
def findById(id:String): Option[Link] = DB.withConnection {implicit connection =>
SQL("select * from links where id=?").on(id).as(simple.singleOpt)
}
This format is very useful sometimes.
No, currently Anorm uses the Scala symbols for the mapping and you can't use '?'.
This may change in the future, but it is not possible right now.
Related
I am trying to get a document from a form here, but my script out is missing. Am i doing anything wrong here. This seems to work when there is more than on argument but it is just one it seems not to be working
try:
documents = {}
if "Select which supporting documentation you would like to accompany your motivation letter" in input_data['checkbox']:
documents['doc1']="https://essentialmedicalguidance.s3.eu-central-1.amazonaws.com/brand/Eli+Lilly/Trulicity/VAE_Trulicity+Package+Insert.pdf"
return documents
except:
return {'empty' : True}
The function always has to return (or set) data. In the case where 'Select which...' is not in input_data['checkbox'], then nothing is returned.
Try something like this instead, which will be more consistent (if you add more fields):
result = {}
if 'Select which...' in input_data['checkbox']:
result['doc1'] = 'https://ess...'
return result
This way, your output is still conditional, but something is always returned.
Let's imagine I have the following parts of a URL:
val url_start = "http://example.com"
val url_part_1 = "&fields[...]&" //This part of url can be in the middle of url or in the end
val url_part_2 = "&include..."
And then I try to concatenate the resulting URL like this:
val complete_url = url_start + url_part_2 + url_part_1
In this case I'd get http://example.com&include...&fields[...]& (don't consider syntax here), which is one & symbol between URL parts which means that concatenation was successful, BUT if I use different concat sequence in a different request like this:
val complete_url = url_start + url_part_1 + url_part_2
I'd get http://example.com&fields[...]&&include..., to be specific && in this case. Is there a way to ensure that concatenation is safer?
To keep you code clean use an array or object to keep your params and doin't keep "?" or "&" as part of urlStart or params. Add these at the end. e.g.
var urlStart = "http://example.com"
var params=[]
params.push ('a=1')
params.push ('b=2')
params.push ('c=3', 'd=4')
url = urlStart + '?' + params.join('&')
console.log (url) // http://example.com?a=1&b=2&c=3&d=4
First, you should note that it is invalid to have query parameters just after domain name; it should be something like http://example.com/?include...&fields[...] (note the /? part, you can replace it with / to make it a path parameter, but it's not likely that the router of the website supports parameters like this). Refer, for example, to this article: https://www.talisman.org/~erlkonig/misc/lunatech%5Ewhat-every-webdev-must-know-about-url-encoding/ to know more about what URLs can be valid.
For the simple abstract approach, you can use Kotlin's joinToString():
val query_part = arrayOf(
"fields[...]",
"include..."
).joinToString("&")
val whole_url = "http://example.com/?" + query_part
print(whole_url) // http://example.com/?fields[...]&include...
This approach is abstract because you can use joinToString() not only for URLs, but for whatever strings you want. This also means that if there will be an & symbol in one of the input strings itself, it will become two parameters in the output string. This is not a problem when you, as a programmer, know what strings will be joined, but if these strings are provided by user, it can become a problem.
For URL-aware approach, you can use URIBuilder from Apache HttpComponents library, but you'll need to import this library first.
A while ago I created a function in PHP to "twitterize" the text of tweets pulled via Twitter's API.
Here's what it looked like:
function twitterize($tweet){
$patterns = array ( "/((([A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&=\+\$,\w]+#)?[A-Za-z0-9.-]+|(?:www.|[-;:&=\+\$,\w]+#)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&;%#.\w_]*)#?(?:[\w]*))?)/",
"/(?<=^|(?<=[^a-zA-Z0-9-\.]))#([A-Za-z_]+[A-Za-z0-9_]+)/",
"/(?<=^|(?<=[^a-zA-Z0-9-\.]))#([A-Za-z_]+[A-Za-z0-9_]+)/");
$replacements = array ("<a href='\\0' target='_blank'>\\0</a>", "<a href='http://twitter.com/\\1' target='_blank'>\\0</a>", "<a href='http://twitter.com/search?q=\\1&src=hash' target='_blank'>\\0</a>");
return preg_replace($patterns, $replacements, $tweet);
}
Now I'm a little stuck with Ruby's gsub, I tried:
def twitterize(text)
patterns = ["/((([A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&=\+\$,\w]+#)?[A-Za-z0-9.-]+|(?:www.|[-;:&=\+\$,\w]+#)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&;%#.\w_]*)#?(?:[\w]*))?)/", "/(?<=^|(?<=[^a-zA-Z0-9-\.]))#([A-Za-z_]+[A-Za-z0-9_]+)/", "/(?<=^|(?<=[^a-zA-Z0-9-\.]))#([A-Za-z_]+[A-Za-z0-9_]+)/"]
replacements = ["<a href='\\0' target='_blank'>\\0</a>",
"<a href='http://twitter.com/\\1' target='_blank'>\\0</a>",
"<a href='http://twitter.com/search?q=\\1&src=hash' target='_blank'>\\0</a>"]
return text.gsub(patterns, replacements)
end
Which obviously didn't work and returned an error:
No implicit conversion of Array into String
And after looking at the Ruby documentation for gsub and exploring a few of the examples they were providing, I still couldn't find a solution to my problem: How can I have gsub handle multiple patterns and multiple replacements at once?
Well, as you can read from the docs, gsub does not handle multiple patterns and replacements at once. That's what causing your error, quite explicit otherwise (you can read that as "give me a String, not an Array!!1").
You can write that like this:
def twitterize(text)
patterns = [/((([A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&=\+\$,\w]+#)?[A-Za-z0-9.-]+|(?:www.|[-;:&=\+\$,\w]+#)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&;%#.\w_]*)#?(?:[\w]*))?)/, /(?<=^|(?<=[^a-zA-Z0-9-\.]))#([A-Za-z_]+[A-Za-z0-9_]+)/, /(?<=^|(?<=[^a-zA-Z0-9-\.]))#([A-Za-z_]+[A-Za-z0-9_]+)/]
replacements = ["<a href='\\0' target='_blank'>\\0</a>",
"<a href='http://twitter.com/\\1' target='_blank'>\\0</a>",
"<a href='http://twitter.com/search?q=\\1&src=hash' target='_blank'>\\0</a>"]
patterns.each_with_index do |pattern, i|
text.gsub!(pattern, replacements[i])
end
text
end
This can be refactored into more elegant rubyish code, but I think it'll do the job.
The error was because you tried to use an array of replacements in the place of a string in the gsub function. Its syntax is:
text.gsub(matching_pattern,replacement_text)
You need to do something like this:
replaced_text = text.gsub(pattern1, replacement1)
replaced_text = replaced_text.gsub(pattern2, replacement2)
and so on, where the pattern 1 is one of your matching patterns and replacement is the replacement text you would like.
I have an URL address that I change dynamically I it goes something like this:
The dynamic part is the -> edition = Model.Edition.Usually it as an integer value and the url ends up something like that: ....&edition=1232113 . Sometimes I need it to end up like that : &edition=1232113#10_11 and I managed to pass th right value to the edition placeholder but after the reload it doesn't show the same url that I expected it is similar but it substitutes the '#' with '%23'. And it looks something like that: 1232113%2310_11 and the effect is not what I expect.
From the other side, when I type it manually : 1232113#10_11 it works.
Can you help?
If you problem is concerning that the Url.Action is converting a part of your url, you may want to use the RAW method.
#Html.Raw(Url.Action("Method","Controller", new { Id = Model.DId, dbId = Model.DbId, iconId = Model.IconId, edition = Model.Edition })
I have found several websites pointing to using the following code to add support for custom parameter formats:
ActionController::Base.param_parsers[Mime::PLIST] = lambda do |body|
str = StringIO.new(body)
plist = CFPropertyList::List.new({:data => str.string})
CFPropertyList.native_types(plist.value)
end
This one here is for the Apple plist format, which is what I am looking to do. However, using Rails 3.2.1, The dev server won't start, saying that param_parsers is undefined. I cannot seam to find any documentation for it being deprecated or any alternative to use, just that it is indeed included in the 2.x documentation and not the 3.x documentation.
Is there any other way in Rails 3 to support custom parameter formats in POST and PUT requests?
The params parsing moved to a Rack middleware. It is now part of ActionDispatch.
To register new parsers, you can either redeclare the use of the middleware like so:
MyRailsApp::Application.config.middleware.delete "ActionDispatch::ParamsParser"
MyRailsApp::Application.config.middleware.use(ActionDispatch::ParamsParser, {
Mime::PLIST => lambda do |body|
str = StringIO.new(body)
plist = CFPropertyList::List.new({:data => str.string})
CFPropertyList.native_types(plist.value)
end
})
or you can change the constant containing the default parsers like so
ActionDispatch::ParamsParser::DEFAULT_PARSERS[Mime::PLIST] = lambda do |body|
str = StringIO.new(body)
plist = CFPropertyList::List.new({:data => str.string})
CFPropertyList.native_types(plist.value)
end
The first variant is probably the cleanest. But you need to be aware that the last one to replace the middleware declaration wins there.