CFIF inside a SQL statment

Question

I have a search page that has 3 possible entries. Service,
City, & Keywords.
Service and City are list/menus and cannot be null, but
Keywords is a text
box and can be null.
I need to write a SQL statement to take the 3 possible
parameters and test
them against the database. Since the first 2 are never null,
I can write
them right inside the SQL string, but how can I only check
for the keywords
if there is something inside the box?
Can I use a <cfif> statement inside the sql string to
only check the 3rd
parameter if it is not NULL?
I wrote this:
Select company, name, phone, city, state, username FROM
members WHERE
city = Form.City AND state = Form.state AND keywords LIKE
Form.keywords
ORDER BY company ASC
Also, since I am passing it from a search page to a results
page, would it
be URL.City verses FORM.City, etc.
Also would like to do this in a component and pass the 3
variables as
arguments with the city and service being required and the
keywords not.
However, I have no idea on what the procedure is for this.
I wrote:
<cfcomponent>
<cffunction name="ServiceSearch" access="remote"
returntype="query">
<cfargument name="service" type="numeric"
required="true">
<cfargument name="city" type="numeric"
required="true">
<cfargument name="keywords" type="string"
required="false">
Select company, name, phone, city, state, username FROM
members WHERE
city = Form.City AND state = Form.state AND keywords LIKE
Form.keywords
ORDER BY company ASC
<cfreturn ServiceResults>
</cffunction>
</cfcomponent>
Do I invoke the component from the results page?
Well, I need to solve the first issue before I attempt the
second. Thanks!
Wally Kolcz
Developer / Support
ProjectProofing.com

Answer 1

Yes you can put <cfif ...> statements inside a
<cfquery...> tag to
modify the SQL string.
WHERE this = that AND
<cfif len(trim(form.something))>
AnotherThing = '#form.something#'
</cfif>
Is valid.
Whether the form variables on the action page are URL or FORM
depends on
the method of your <form ...> tag. method="post"
creates form variables
on the action page, method="get" creates URL variables on the
action page.
You write <cfargument ...> tags for each argument you
want to pass into
a function.
<cfargument name="city" required="true" ...>
OR
<cfargument name="foobar" required="false" default=""
...>
You then use these in the function with the arguments scope.
#arguments.city# and #arguments.foobar#
You then pass these into the function from your calling page.
There are
numerous ways this can be done, here are a few.
<cfinvoke .... city="Sacramento" foobar="george"/>
<finvoke ... >
<cfinvokeArgument name="city" value="Sacramento">
<cfinvokeArgument name="foobar" value="george">
</cfinvoke>
<cfset myComponent =
createObject("component","my.component.path.andName)>
...myComponent.aFunction("Sacramento","george")...
...myComponent.aFunction(city:"Sacrament",foobar:"george")...o
Wally Kolcz wrote:
> I have a search page that has 3 possible entries.
Service, City, & Keywords.
>
> Service and City are list/menus and cannot be null, but
Keywords is a text
> box and can be null.
>
> I need to write a SQL statement to take the 3 possible
parameters and test
> them against the database. Since the first 2 are never
null, I can write
> them right inside the SQL string, but how can I only
check for the keywords
> if there is something inside the box?
>
> Can I use a <cfif> statement inside the sql string
to only check the 3rd
> parameter if it is not NULL?
>
> I wrote this:
>
> Select company, name, phone, city, state, username FROM
members WHERE
> city = Form.City AND state = Form.state AND keywords
LIKE Form.keywords
> ORDER BY company ASC
>
> Also, since I am passing it from a search page to a
results page, would it
> be URL.City verses FORM.City, etc.
>
> Also would like to do this in a component and pass the 3
variables as
> arguments with the city and service being required and
the keywords not.
> However, I have no idea on what the procedure is for
this.
>
> I wrote:
> <cfcomponent>
> <cffunction name="ServiceSearch" access="remote"
returntype="query">
> <cfargument name="service" type="numeric"
required="true">
> <cfargument name="city" type="numeric"
required="true">
> <cfargument name="keywords" type="string"
required="false">
> Select company, name, phone, city, state, username FROM
members WHERE
> city = Form.City AND state = Form.state AND keywords
LIKE Form.keywords
> ORDER BY company ASC
> <cfreturn ServiceResults>
> </cffunction>
> </cfcomponent>
>
> Do I invoke the component from the results page?
>
> Well, I need to solve the first issue before I attempt
the second. Thanks!
>