ideal

/ideal/

Cases

SingularPluralWhen to use it
nominativeidealthe idealideallathe idealsthe plain dictionary form — the doer of the sentence
genitiveidealnıthe ideal'sideallanıthe ideals'the owner — whose it is
accusativeidealnıthe ideal (as the object)ideallanıthe ideals (as the object)a specific, known object — whom or what
dativeidealğato the idealideallağato the idealsdirection or recipient — to where, to whom
locativeidealdaat / in the idealidealladaat / in the idealswhere it is; also having — mende bar, "I have it"
ablativeidealdanfrom the idealidealladanfrom the idealswhere it comes from; also "than" when comparing
When to use each case
nominative
the plain dictionary form — the doer of the sentence
genitive
the owner — whose it is
accusative
a specific, known object — whom or what
dative
direction or recipient — to where, to whom
locative
where it is; also having — mende bar, "I have it"
ablative
where it comes from; also "than" when comparing

The endings are the same ones the pronouns wear — that page explains when each case is used.

With an owner

One ownedSeveral owned
myidealımmy idealideallarımmy ideals
youridealıngyour idealideallarıngyour ideals
his / heridealıhis / her idealideallarıhis / her ideals
ouridealıbızour idealideallarıbızour ideals
you all'sidealığızyou all's idealideallarığızyou all's ideals
theirideallarıtheir idealideallarıtheir ideals

The overlap in the last rows is real, not a mistake: idealları can mean "his / her ideals", "their ideal", or "their ideals" — context decides.