Trying to build a barebones concept in Ruby on Rails that will take a string, map each individual word in this string, compare it and then substitute the word if it matches predefined strings in related databases.
For example: User inputs in text field "What does lol and brb mean?" Hits Submit button. The action gives back the same text with "lol" and "brb" changed to "laughing out loud" and "be right back".
So far I have a Post model & table for the User input that stores the string in the database.
I have an Acronym model & table that has "lol" and "brb" stored in database with a foreign key reference to Acronym_Translate model & table that has "laughing out loud" and "be right back" referenced to "lol" and "brb", respectively.
How would I connect the Post model/table to the Acronym model/table in order to compare the strings in Post and substitute with strings from Acronym model/table? And what command could achieve such function? Would gsub! method work here?
Any help would be appreciated!
Are you sure that you want to connect the Post table to the Acronym table? This means that you would have to identify and keep a record of each instance of an acronym within a post.
You can do this using a many to many relation or if you want to store extra data about each acronym occurrence you should create a link table named AcronymPost and use a has many through relationship between Post and Acronym. When you parse a post value, and when you identify an acronym in the post, you would have to record this in the database and then use gsub to replace the post value with the acronym.
You can iterate through your table of acronyms and use (string).include? method to check if it occurs in the post. Finally, you could use a gsub command to replace the acronym with its translation.
Related
I have a Project and when searching a query I need to split the data (not search query) in to words and apply searching.
for example:
my query is : 'bot' (typing 'bottle')
but if I use meta_keywords__icontains = query the filter will also return queries with 'robot'.
Here meta_keywords are keywords that can be used for searching.
I won't be able to access data if the data in meta_keywords is 'water bottle' when I use meta_keywords__istartswith is there any way I can use in this case.
what I just need is search in every words of data with just istartswith
I can simply create a model for 'meta_keywords' and use the current data to assign values by splitting and saving as different data. I know it might be the best way. I need some other ways to achieve it.
You can search the name field with each word that istartswith in variable query.
import re
instances = Model.objects.filter(Q(name__iregex=r'[[:<:]]' + re.escape(query)))
Eg: Hello world can be searched using the query 'hello' and 'world'. It don't check the icontains
note: It works only in Python3
I have blog with articles ( Article is model). Every article contains title and body. I need to add field, which contains list of unique words of that article and occurrence in the article. For example, article " Hello my name is John, hello", field "words" should looks like:
{"hello": 2, "my": 1, "name":1, "is":1, "john":1}
Additionally, i should have endpoint, which returns ALL words from ALL articles and their occurrence.
How I want to implement it:
Add field "unique_words" (type JSONField) and default value "please wait, word's occurrence are being calculated...". Then add post save signals which via Celery will do all calcuration and update field "unique_words" with data like this
{"hello": 2, "my": 1, "name":1, "is":1, "john":1}
Also I add endpoint, which will retrieve unique_words from all articles and summarize them.
Is it best solution? Could you please recommend something better?
I am trying to fetch records from ExtJS store which start with specific substring.
e.g. If I have a country store and if I have a string 'IN' then I want records of India and Indonesia from store.
Is there any way to do this?
Thanks
I suppose this is about a combobox, so that's the default behavior.
For example: https://fiddle.sencha.com/#fiddle/11r4
If you just want to filter a store, look at:
filters config - Array of Filters for this store.
filter method - Filters the data in the Store by one or more fields.
filterBy method - Filters by a function.
Ext.util.Filter - Represents a filter that can be applied to a MixedCollection.
With the following Django model:
class Item(models.Model):
name = CharField(max_len=256)
description = TextField()
I need to formulate a filter method that takes a list of n words (word_list) and returns the queryset of Items where each word in word_list can be found, either in the name or the description.
To do this with a single field is straightforward enough. Using the reduce technique described here (this could also be done with a for loop), this looks like:
q = reduce(operator.and_, (Q(description__contains=word) for word in word_list))
Item.objects.filter(q)
I want to do the same thing but take into account that each word can appear either in the name or the description. I basically want to query the concatenation of the two fields, for each word. Can this be done?
I have read that there is a concatenation operator in Postgresql, || but I am not sure if this can be utilized somehow in django to achieve this end.
As a last resort, I can create a third column that contains the combination of the two fields and maintain it via post_save signal handlers and/or save method overrides, but I'm wondering whether I can do this on the fly without maintaining this type of "search index" type of column.
The most straightforward way would be to use Q to do an OR:
lookups = [Q(name__contains=word) | Q(description__contains=word)
for word in words]
Item.objects.filter(*lookups) # the same as and'ing them together
I can't speak to the performance of this solution as compared to your other two options (raw SQL concatenation or denormalization), but it's definitely simpler.
I want to have a content entry block. When a user types #word or #blah in a field, I want efficiently search that field and add the string right after the "#" to a different field as a n entry in a different table. Like what Twitter does. This would allow a user to sort by that string later.
I believe that I would do this as a part of the save method on the model, but I'm not sure. AND, if the #blah already exists, than the content would belong to that "blah"
Can anyone suggest samples of how to do this? This is a little beyond what I'm able to figure out on my own.
Thanks!
You can use regex (re) during save() or whenever to check if your field text contains #(?P<blah>\w+) , extract your blah and and use it for whatever you want .