How do I search an entire model based on the value returned by a virtual attribute on that model?
0
I have a model Property, and I have a virtual attribute that is defined like this:
def uid_type
if mls? && mls.to_i != 0
"MLS"
elsif property_identifier? && property_identifier.to_i != 0
"PID"
else
"ID"
end
end
Such that if I have a property p, when I query that virtual attribute, this is what I see:
> p.uid_type
=> "MLS"
Basically, what I want to do is create a scope on my model to return all properties that have uid_type == 'MLS'.
How do I do that?
Edit 1
If I try this:
Property.where('properties.uid_type == "MLS"').count
(4.6ms) SELECT COUNT(*) FROM "properties" WHERE (properties.uid_type == "MLS")
ActiveRecord::StatementInvalid: PG::UndefinedColumn: ERROR: column properties.uid_type does not exist
LINE 1: SELECT COUNT(*) FROM "properties" WHERE (properties.uid_typ...
ruby-on-rails activerecord ruby-on-rails-3.2
asked Nov 12 '18 at 1:00
marcamillion
10.9k43138287
add a comment |
0
I have a model Property, and I have a virtual attribute that is defined like this:
def uid_type
if mls? && mls.to_i != 0
"MLS"
elsif property_identifier? && property_identifier.to_i != 0
"PID"
else
"ID"
end
end
Such that if I have a property p, when I query that virtual attribute, this is what I see:
> p.uid_type
=> "MLS"
Basically, what I want to do is create a scope on my model to return all properties that have uid_type == 'MLS'.
How do I do that?
Edit 1
If I try this:
Property.where('properties.uid_type == "MLS"').count
(4.6ms) SELECT COUNT(*) FROM "properties" WHERE (properties.uid_type == "MLS")
ActiveRecord::StatementInvalid: PG::UndefinedColumn: ERROR: column properties.uid_type does not exist
LINE 1: SELECT COUNT(*) FROM "properties" WHERE (properties.uid_typ...
ruby-on-rails activerecord ruby-on-rails-3.2
asked Nov 12 '18 at 1:00
marcamillion
10.9k43138287
add a comment |
0
0
0
I have a model Property, and I have a virtual attribute that is defined like this:
def uid_type
if mls? && mls.to_i != 0
"MLS"
elsif property_identifier? && property_identifier.to_i != 0
"PID"
else
"ID"
end
end
Such that if I have a property p, when I query that virtual attribute, this is what I see:
> p.uid_type
=> "MLS"
Basically, what I want to do is create a scope on my model to return all properties that have uid_type == 'MLS'.
How do I do that?
Edit 1
If I try this:
Property.where('properties.uid_type == "MLS"').count
(4.6ms) SELECT COUNT(*) FROM "properties" WHERE (properties.uid_type == "MLS")
ActiveRecord::StatementInvalid: PG::UndefinedColumn: ERROR: column properties.uid_type does not exist
LINE 1: SELECT COUNT(*) FROM "properties" WHERE (properties.uid_typ...
ruby-on-rails activerecord ruby-on-rails-3.2
asked Nov 12 '18 at 1:00
marcamillion
10.9k43138287
I have a model Property, and I have a virtual attribute that is defined like this:
def uid_type
if mls? && mls.to_i != 0
"MLS"
elsif property_identifier? && property_identifier.to_i != 0
"PID"
else
"ID"
end
end
Such that if I have a property p, when I query that virtual attribute, this is what I see:
> p.uid_type
=> "MLS"
Basically, what I want to do is create a scope on my model to return all properties that have uid_type == 'MLS'.
How do I do that?
Edit 1
If I try this:
Property.where('properties.uid_type == "MLS"').count
(4.6ms) SELECT COUNT(*) FROM "properties" WHERE (properties.uid_type == "MLS")
ActiveRecord::StatementInvalid: PG::UndefinedColumn: ERROR: column properties.uid_type does not exist
LINE 1: SELECT COUNT(*) FROM "properties" WHERE (properties.uid_typ...
ruby-on-rails activerecord ruby-on-rails-3.2
ruby-on-rails activerecord ruby-on-rails-3.2
asked Nov 12 '18 at 1:00
marcamillion
10.9k43138287
asked Nov 12 '18 at 1:00
marcamillion
10.9k43138287
asked Nov 12 '18 at 1:00
marcamillion
10.9k43138287
asked Nov 12 '18 at 1:00
marcamillion
10.9k43138287
asked Nov 12 '18 at 1:00
marcamillion
10.9k43138287
10.9k43138287
add a comment |
add a comment |
1 Answer
1
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2
You have to write your own scope, ActiveRecord doesn't help much with custom methods.
scope :with_mls_uid_type, -> where.not(mls: [nil, ''])
Which will translate to:
SELECT "properties".*
FROM "properties"
WHERE ("properties"."mls" IS NOT NULL)
AND ("properties"."mls" != '')
If your tag is correct and you're still on Rails 3.2 then you won't have .not and you will have to do:
where("mls IS NOT NULL AND mls != ''")
answered Nov 12 '18 at 1:06
Marcin Kołodziej
4,2611315
I was just about to ask about Rails 3.2 and thenot. So I tried your example, and I am getting the following error:> Property.where("mls IS NOT NULL AND mls !=0").count (1.3ms) SELECT COUNT(*) FROM "properties" WHERE (mls IS NOT NULL AND mls !=0) ActiveRecord::StatementInvalid: PG::UndefinedFunction: ERROR: operator does not exist: character varying <> integer HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts.
– marcamillion
Nov 12 '18 at 1:11
Btw. are you sure you know howmls.to_i != 0works ifmlsis a string?"5foo".to_i == 5, but"foo".to_i == 0. It's important for the scope as it's not as simple to write in PostgreSQL and might not be exactly what you're looking for.
– Marcin Kołodziej
Nov 12 '18 at 1:16
I am honestly not sure. This is a legacy codebase I am taking over, so I am just now digging through everything. But I will look into that and do proper error handling as needed. Thanks for the answer and the feedback!
– marcamillion
Nov 12 '18 at 1:22
add a comment |
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1 Answer
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oldest
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1 Answer
1
active
oldest
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active
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active
oldest
votes
2
You have to write your own scope, ActiveRecord doesn't help much with custom methods.
scope :with_mls_uid_type, -> where.not(mls: [nil, ''])
Which will translate to:
SELECT "properties".*
FROM "properties"
WHERE ("properties"."mls" IS NOT NULL)
AND ("properties"."mls" != '')
If your tag is correct and you're still on Rails 3.2 then you won't have .not and you will have to do:
where("mls IS NOT NULL AND mls != ''")
answered Nov 12 '18 at 1:06
Marcin Kołodziej
4,2611315
I was just about to ask about Rails 3.2 and thenot. So I tried your example, and I am getting the following error:> Property.where("mls IS NOT NULL AND mls !=0").count (1.3ms) SELECT COUNT(*) FROM "properties" WHERE (mls IS NOT NULL AND mls !=0) ActiveRecord::StatementInvalid: PG::UndefinedFunction: ERROR: operator does not exist: character varying <> integer HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts.
– marcamillion
Nov 12 '18 at 1:11
Btw. are you sure you know howmls.to_i != 0works ifmlsis a string?"5foo".to_i == 5, but"foo".to_i == 0. It's important for the scope as it's not as simple to write in PostgreSQL and might not be exactly what you're looking for.
– Marcin Kołodziej
Nov 12 '18 at 1:16
I am honestly not sure. This is a legacy codebase I am taking over, so I am just now digging through everything. But I will look into that and do proper error handling as needed. Thanks for the answer and the feedback!
– marcamillion
Nov 12 '18 at 1:22
add a comment |
2
You have to write your own scope, ActiveRecord doesn't help much with custom methods.
scope :with_mls_uid_type, -> where.not(mls: [nil, ''])
Which will translate to:
SELECT "properties".*
FROM "properties"
WHERE ("properties"."mls" IS NOT NULL)
AND ("properties"."mls" != '')
If your tag is correct and you're still on Rails 3.2 then you won't have .not and you will have to do:
where("mls IS NOT NULL AND mls != ''")
answered Nov 12 '18 at 1:06
Marcin Kołodziej
4,2611315
I was just about to ask about Rails 3.2 and thenot. So I tried your example, and I am getting the following error:> Property.where("mls IS NOT NULL AND mls !=0").count (1.3ms) SELECT COUNT(*) FROM "properties" WHERE (mls IS NOT NULL AND mls !=0) ActiveRecord::StatementInvalid: PG::UndefinedFunction: ERROR: operator does not exist: character varying <> integer HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts.
– marcamillion
Nov 12 '18 at 1:11
Btw. are you sure you know howmls.to_i != 0works ifmlsis a string?"5foo".to_i == 5, but"foo".to_i == 0. It's important for the scope as it's not as simple to write in PostgreSQL and might not be exactly what you're looking for.
– Marcin Kołodziej
Nov 12 '18 at 1:16
I am honestly not sure. This is a legacy codebase I am taking over, so I am just now digging through everything. But I will look into that and do proper error handling as needed. Thanks for the answer and the feedback!
– marcamillion
Nov 12 '18 at 1:22
add a comment |
2
2
2
You have to write your own scope, ActiveRecord doesn't help much with custom methods.
scope :with_mls_uid_type, -> where.not(mls: [nil, ''])
Which will translate to:
SELECT "properties".*
FROM "properties"
WHERE ("properties"."mls" IS NOT NULL)
AND ("properties"."mls" != '')
If your tag is correct and you're still on Rails 3.2 then you won't have .not and you will have to do:
where("mls IS NOT NULL AND mls != ''")
answered Nov 12 '18 at 1:06
Marcin Kołodziej
4,2611315
You have to write your own scope, ActiveRecord doesn't help much with custom methods.
scope :with_mls_uid_type, -> where.not(mls: [nil, ''])
Which will translate to:
SELECT "properties".*
FROM "properties"
WHERE ("properties"."mls" IS NOT NULL)
AND ("properties"."mls" != '')
If your tag is correct and you're still on Rails 3.2 then you won't have .not and you will have to do:
where("mls IS NOT NULL AND mls != ''")
answered Nov 12 '18 at 1:06
Marcin Kołodziej
4,2611315
edited Nov 12 '18 at 1:37
answered Nov 12 '18 at 1:06
Marcin Kołodziej
4,2611315
answered Nov 12 '18 at 1:06
Marcin Kołodziej
4,2611315
answered Nov 12 '18 at 1:06
Marcin Kołodziej
4,2611315
4,2611315
I was just about to ask about Rails 3.2 and thenot. So I tried your example, and I am getting the following error:> Property.where("mls IS NOT NULL AND mls !=0").count (1.3ms) SELECT COUNT(*) FROM "properties" WHERE (mls IS NOT NULL AND mls !=0) ActiveRecord::StatementInvalid: PG::UndefinedFunction: ERROR: operator does not exist: character varying <> integer HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts.
– marcamillion
Nov 12 '18 at 1:11
Btw. are you sure you know howmls.to_i != 0works ifmlsis a string?"5foo".to_i == 5, but"foo".to_i == 0. It's important for the scope as it's not as simple to write in PostgreSQL and might not be exactly what you're looking for.
– Marcin Kołodziej
Nov 12 '18 at 1:16
I am honestly not sure. This is a legacy codebase I am taking over, so I am just now digging through everything. But I will look into that and do proper error handling as needed. Thanks for the answer and the feedback!
– marcamillion
Nov 12 '18 at 1:22
add a comment |
I was just about to ask about Rails 3.2 and thenot. So I tried your example, and I am getting the following error:> Property.where("mls IS NOT NULL AND mls !=0").count (1.3ms) SELECT COUNT(*) FROM "properties" WHERE (mls IS NOT NULL AND mls !=0) ActiveRecord::StatementInvalid: PG::UndefinedFunction: ERROR: operator does not exist: character varying <> integer HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts.
– marcamillion
Nov 12 '18 at 1:11
Btw. are you sure you know howmls.to_i != 0works ifmlsis a string?"5foo".to_i == 5, but"foo".to_i == 0. It's important for the scope as it's not as simple to write in PostgreSQL and might not be exactly what you're looking for.
– Marcin Kołodziej
Nov 12 '18 at 1:16
I am honestly not sure. This is a legacy codebase I am taking over, so I am just now digging through everything. But I will look into that and do proper error handling as needed. Thanks for the answer and the feedback!
– marcamillion
Nov 12 '18 at 1:22
I was just about to ask about Rails 3.2 and the
not. So I tried your example, and I am getting the following error: > Property.where("mls IS NOT NULL AND mls !=0").count (1.3ms) SELECT COUNT(*) FROM "properties" WHERE (mls IS NOT NULL AND mls !=0) ActiveRecord::StatementInvalid: PG::UndefinedFunction: ERROR: operator does not exist: character varying <> integer HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts.– marcamillion
Nov 12 '18 at 1:11
I was just about to ask about Rails 3.2 and the
not. So I tried your example, and I am getting the following error: > Property.where("mls IS NOT NULL AND mls !=0").count (1.3ms) SELECT COUNT(*) FROM "properties" WHERE (mls IS NOT NULL AND mls !=0) ActiveRecord::StatementInvalid: PG::UndefinedFunction: ERROR: operator does not exist: character varying <> integer HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts.– marcamillion
Nov 12 '18 at 1:11
Btw. are you sure you know how
mls.to_i != 0 works if mls is a string? "5foo".to_i == 5, but "foo".to_i == 0. It's important for the scope as it's not as simple to write in PostgreSQL and might not be exactly what you're looking for.– Marcin Kołodziej
Nov 12 '18 at 1:16
Btw. are you sure you know how
mls.to_i != 0 works if mls is a string? "5foo".to_i == 5, but "foo".to_i == 0. It's important for the scope as it's not as simple to write in PostgreSQL and might not be exactly what you're looking for.– Marcin Kołodziej
Nov 12 '18 at 1:16
I am honestly not sure. This is a legacy codebase I am taking over, so I am just now digging through everything. But I will look into that and do proper error handling as needed. Thanks for the answer and the feedback!
– marcamillion
Nov 12 '18 at 1:22
I am honestly not sure. This is a legacy codebase I am taking over, so I am just now digging through everything. But I will look into that and do proper error handling as needed. Thanks for the answer and the feedback!
– marcamillion
Nov 12 '18 at 1:22
add a comment |
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